mkultra-foia-mineru-archive

record_version stringclasses 1 value	record_id stringlengths 15 15	doc_id stringlengths 10 10	page int64 1 823	source dict	text stringlengths 0 8.33k	diplomatic_text stringlengths 0 9.67k	redactions listlengths 0 264	blocks listlengths 0 58	quality dict	processing dict
ultra-page-v2-redactions	0000017352_0001	0000017352	1	{ "filename": "0000017352_0001_1248_1575.png", "width": 1248, "height": 1575, "size_bytes": 74272 }	OFFICE OF THE DIRECTOR MEMORANDUM FOR: DEPUTY DIRECTOR (ADMINISTRATION) Project MKULTRA-Extremely Sensitive SUBJECT Research and Development Program 1. On 6 June 1952, the Project Review Committee approved to the the DD/P/TSS ResearchProgram and allotted Program for Fiscal Year 1953. This sum provided for research an...	OFFICE OF THE DIRECTOR MEMORANDUM FOR: DEPUTY DIRECTOR (ADMINISTRATION) Project MKULTRA-Extremely Sensitive SUBJECT Research and Development Program 1. On 6 June 1952, the Project Review Committee approved to the the DD/P/TSS ResearchProgram and allotted Program for Fiscal Year 1953. This sum provided for research an...	[ { "marker": "(redacted_44)", "estimated_character_spaces": 44, "estimate_range": [ 35, 53 ], "bbox_pixels": [ 509, 91, 673, 160 ], "width_px": 164, "height_px": 69, "fill_ratio": 0.582, "aspect_ratio": 2.377, "character_pitch_px": 3.71,...	[ { "order": 0, "type": "text", "text": "OFFICE OF THE DIRECTOR", "bbox": [ 365, 160, 590, 179 ], "page_idx": 0 }, { "order": 1, "type": "text", "text": "MEMORANDUM FOR: DEPUTY DIRECTOR (ADMINISTRATION) Project MKULTRA-Extremely Sensitive\nSUBJECT Resear...	{ "character_count": 1450, "word_count": 225, "block_count": 9, "empty": false, "needs_review": false, "review_reasons": [ "redaction_detected" ] }	{ "engine": "MinerU", "mineru_version": "3.4.4", "backend": "pipeline", "content_list_path": "batch_0001/0000017352_0001_1248_1575/auto/0000017352_0001_1248_1575_content_list.json" }
ultra-page-v2-redactions	0000017352_0002	0000017352	2	{ "filename": "0000017352_0002_1248_1575.png", "width": 1248, "height": 1575, "size_bytes": 66508 }	DD/P/TSS. as the Research Director, that the invoice applies to Project MKULTRA and that the conditions outlined in the DD/P memorandum fer DCI dated 3 April have been complied with,: The certification will also request that payment be made; c) the invoice shall bear the certification of the Executive Secretary of the...	DD/P/TSS. as the Research Director, that the invoice applies to Project MKULTRA and that the conditions outlined in the DD/P memorandum fer DCI dated 3 April have been complied with,: The certification will also request that payment be made; c) the invoice shall bear the certification of the Executive Secretary of the...	[ { "marker": "(redacted_8)", "estimated_character_spaces": 8, "estimate_range": [ 6, 10 ], "bbox_pixels": [ 820, 263, 854, 279 ], "width_px": 34, "height_px": 16, "fill_ratio": 0.611, "aspect_ratio": 2.125, "character_pitch_px": 4, "...	[ { "order": 0, "type": "text", "text": "DD/P/TSS. as the Research Director, that the invoice applies to Project MKULTRA and that the conditions outlined in the DD/P memorandum fer DCI dated 3 April have been complied with,: The certification will also request that payment be made;", "bbox": [ 2...	{ "character_count": 1777, "word_count": 288, "block_count": 7, "empty": false, "needs_review": false, "review_reasons": [ "redaction_detected" ] }	{ "engine": "MinerU", "mineru_version": "3.4.4", "backend": "pipeline", "content_list_path": "batch_0001/0000017352_0002_1248_1575/auto/0000017352_0002_1248_1575_content_list.json" }
ultra-page-v2-redactions	0000017352_0003	0000017352	3	{ "filename": "0000017352_0003_1248_1575.png", "width": 1248, "height": 1575, "size_bytes": 73853 }	OFFICE OF THE DIRECTOR MEMORANDUM FOR: DEPUTY DIRECTOR (ADMINISTRATION) 1.[n accordance with previous arrangements, TSS has been. authorized to spendof its annual Research and Development budgct in accordancewith procedures and controls approved by.me for Project MKULTRA. 2. Subproject 35 of MKULTRA in the amount of...	OFFICE OF THE DIRECTOR MEMORANDUM FOR: DEPUTY DIRECTOR (ADMINISTRATION) 1.[n accordance with previous arrangements, TSS has been. authorized to spendof its annual Research and Development budgct in accordancewith procedures and controls approved by.me for Project MKULTRA. 2. Subproject 35 of MKULTRA in the amount of...	[ { "marker": "(redacted_15)", "estimated_character_spaces": 15, "estimate_range": [ 12, 18 ], "bbox_pixels": [ 980, 101, 1081, 117 ], "width_px": 101, "height_px": 16, "fill_ratio": 0.618, "aspect_ratio": 6.312, "character_pitch_px": 6.9...	[ { "order": 0, "type": "text", "text": "OFFICE OF THE DIRECTOR", "bbox": [ 403, 135, 625, 155 ], "page_idx": 0 }, { "order": 1, "type": "text", "text": "MEMORANDUM FOR: DEPUTY DIRECTOR (ADMINISTRATION)", "bbox": [ 187, 239, 806, ...	{ "character_count": 960, "word_count": 153, "block_count": 8, "empty": false, "needs_review": false, "review_reasons": [ "redaction_detected" ] }	{ "engine": "MinerU", "mineru_version": "3.4.4", "backend": "pipeline", "content_list_path": "batch_0001/0000017352_0003_1248_1575/auto/0000017352_0003_1248_1575_content_list.json" }
ultra-page-v2-redactions	0000017352_0004	0000017352	4	{ "filename": "0000017352_0004_1248_1575.png", "width": 1248, "height": 1575, "size_bytes": 66571 }	1. Late in 195l, at the request of the Azency, sae és Washington to hclp establiah a'research programu dntigned te assate (or the covert Officce of the Agency) the weapons, deviceo, eqaipsus abd methods needed to acconplish the respective mlssioas, 2.. The first task confronting me was to evoive a plan to make it pos...	1. Late in 195l, at the request of the Azency, sae és Washington to hclp establiah a'research programu dntigned te assate (or the covert Officce of the Agency) the weapons, deviceo, eqaipsus abd methods needed to acconplish the respective mlssioas, 2.. The first task confronting me was to evoive a plan to make it pos...	[ { "marker": "(redacted_40)", "estimated_character_spaces": 40, "estimate_range": [ 32, 48 ], "bbox_pixels": [ 198, 413, 309, 431 ], "width_px": 111, "height_px": 18, "fill_ratio": 0.629, "aspect_ratio": 6.167, "character_pitch_px": 2.78...	[ { "order": 0, "type": "text", "text": "1. Late in 195l, at the request of the Azency, sae és Washington to hclp establiah a'research programu dntigned te assate (or the covert Officce of the Agency) the weapons, deviceo, eqaipsus abd methods needed to acconplish the respective mlssioas,", "bbox": [...	{ "character_count": 1759, "word_count": 288, "block_count": 7, "empty": false, "needs_review": false, "review_reasons": [ "redaction_detected" ] }	{ "engine": "MinerU", "mineru_version": "3.4.4", "backend": "pipeline", "content_list_path": "batch_0001/0000017352_0004_1248_1575/auto/0000017352_0004_1248_1575_content_list.json" }
ultra-page-v2-redactions	0000017352_0005	0000017352	5	{ "filename": "0000017352_0005_1248_1575.png", "width": 1248, "height": 1575, "size_bytes": 72649 }	aed asstsi the Director of Researck in the tormratanan of a yearly tesvácea rograñá avd à projoéed budget; ond to mcet troia tire to tiine te révžs the work cone and moke such recoanendations as Rt may see ft talsv ita Chairman. Also it islztended that tais Board shall be prepared te give assistance and advice to the D...	aed asstsi the Director of Researck in the tormratanan of a yearly tesvácea rograñá avd à projoéed budget; ond to mcet troia tire to tiine te révžs the work cone and moke such recoanendations as Rt may see ft talsv ita Chairman. Also it islztended that tais Board shall be prepared te give assistance and advice to the D...	[ { "marker": "(redacted_13)", "estimated_character_spaces": 13, "estimate_range": [ 10, 16 ], "bbox_pixels": [ 356, 323, 392, 334 ], "width_px": 36, "height_px": 11, "fill_ratio": 0.616, "aspect_ratio": 3.273, "character_pitch_px": 2.67,...	[ { "order": 0, "type": "text", "text": "aed asstsi the Director of Researck in the tormratanan of a yearly tesvácea rograñá avd à projoéed budget; ond to mcet troia tire to tiine te révžs the work cone and moke such recoanendations as Rt may see ft talsv ita Chairman. Also it islztended that tais Board s...	{ "character_count": 1803, "word_count": 292, "block_count": 3, "empty": false, "needs_review": false, "review_reasons": [ "redaction_detected" ] }	{ "engine": "MinerU", "mineru_version": "3.4.4", "backend": "pipeline", "content_list_path": "batch_0001/0000017352_0005_1248_1575/auto/0000017352_0005_1248_1575_content_list.json" }
ultra-page-v2-redactions	0000017352_0006	0000017352	6	{ "filename": "0000017352_0006_1248_1575.png", "width": 1248, "height": 1575, "size_bytes": 70886 }	tv CENTRAL INTELLIGENCE AGENCY WASHINGTON 25, D. C. OFFICE OF THE DIRECTOR 19 June 1953 DOZOPANDUH, FOR: DEPUTY DIRECTOR (ADHINISTRATION) STEJECT TSS Research Program 1. On 6 June 1952. the DCI approved PRC recommendation TS No. Sor Fiscal Year 1953 for the initial phase 63/h which allocated of tho Pesearch Progrem...	tv CENTRAL INTELLIGENCE AGENCY WASHINGTON 25, D. C. OFFICE OF THE DIRECTOR 19 June 1953 DOZOPANDUH, FOR: DEPUTY DIRECTOR (ADHINISTRATION) STEJECT TSS Research Program 1. On 6 June 1952. the DCI approved PRC recommendation TS No. Sor Fiscal Year 1953 for the initial phase 63/h which allocated of tho Pesearch Progrem...	[ { "marker": "(redacted_10)", "estimated_character_spaces": 10, "estimate_range": [ 8, 12 ], "bbox_pixels": [ 734, 127, 827, 147 ], "width_px": 93, "height_px": 20, "fill_ratio": 0.702, "aspect_ratio": 4.65, "character_pitch_px": 9.727, ...	[ { "order": 0, "type": "text", "text": "tv CENTRAL INTELLIGENCE AGENCY WASHINGTON 25, D. C.", "bbox": [ 347, 75, 668, 118 ], "page_idx": 0 }, { "order": 1, "type": "text", "text": "OFFICE OF THE DIRECTOR", "bbox": [ 407, 119, 621, ...	{ "character_count": 1535, "word_count": 236, "block_count": 13, "empty": false, "needs_review": false, "review_reasons": [ "redaction_detected" ] }	{ "engine": "MinerU", "mineru_version": "3.4.4", "backend": "pipeline", "content_list_path": "batch_0001/0000017352_0006_1248_1575/auto/0000017352_0006_1248_1575_content_list.json" }
ultra-page-v2-redactions	0000017352_0007	0000017352	7	{ "filename": "0000017352_0007_1248_1575.png", "width": 1248, "height": 1575, "size_bytes": 70037 }	MEMORANDUM FOR: COMPTROLLER : DD/P/TSS Project MKULTRA - Extremely Sensitive Research and Development Programs 1. On 6 June 1952, the Project Review Committee approved the DD/P/TSS Research Program and allotted to the Program for Fiscal Year 1953. This surn provided for rescarch and for.operating costs. 2. The PRC a...	MEMORANDUM FOR: COMPTROLLER : DD/P/TSS Project MKULTRA - Extremely Sensitive Research and Development Programs 1. On 6 June 1952, the Project Review Committee approved the DD/P/TSS Research Program and allotted to the Program for Fiscal Year 1953. This surn provided for rescarch and for.operating costs. 2. The PRC a...	[ { "marker": "(redacted_10)", "estimated_character_spaces": 10, "estimate_range": [ 8, 12 ], "bbox_pixels": [ 938, 227, 991, 253 ], "width_px": 53, "height_px": 26, "fill_ratio": 0.647, "aspect_ratio": 2.038, "character_pitch_px": 5.145,...	[ { "order": 0, "type": "text", "text": "MEMORANDUM FOR: COMPTROLLER", "bbox": [ 175, 183, 559, 208 ], "page_idx": 0 }, { "order": 1, "type": "text", "text": ": DD/P/TSS Project MKULTRA - Extremely Sensitive Research and Development Programs", "bbox"...	{ "character_count": 1435, "word_count": 227, "block_count": 8, "empty": false, "needs_review": false, "review_reasons": [ "redaction_detected" ] }	{ "engine": "MinerU", "mineru_version": "3.4.4", "backend": "pipeline", "content_list_path": "batch_0001/0000017352_0007_1248_1575/auto/0000017352_0007_1248_1575_content_list.json" }
ultra-page-v2-redactions	0000017352_0008	0000017352	8	{ "filename": "0000017352_0008_1248_1575.png", "width": 1248, "height": 1575, "size_bytes": 67644 }	applies to Project MKULTRA and that the conditions outlined in the DD/P memorandum for DCI dated 3 April havc been complied with. The certification will also request that payment be made; (c) the invoice shall bear the certification of the Executive Secretary of the Research Board that the scope of the program has bee...	applies to Project MKULTRA and that the conditions outlined in the DD/P memorandum for DCI dated 3 April havc been complied with. The certification will also request that payment be made; (c) the invoice shall bear the certification of the Executive Secretary of the Research Board that the scope of the program has bee...	[ { "marker": "(redacted_28)", "estimated_character_spaces": 28, "estimate_range": [ 22, 34 ], "bbox_pixels": [ 798, 234, 911, 251 ], "width_px": 113, "height_px": 17, "fill_ratio": 0.608, "aspect_ratio": 6.647, "character_pitch_px": 3.97...	[ { "order": 0, "type": "text", "text": "applies to Project MKULTRA and that the conditions outlined in the DD/P memorandum for DCI dated 3 April havc been complied with. The certification will also request that payment be made;", "bbox": [ 233, 144, 772, 222 ], "page_i...	{ "character_count": 1872, "word_count": 302, "block_count": 6, "empty": false, "needs_review": false, "review_reasons": [ "redaction_detected" ] }	{ "engine": "MinerU", "mineru_version": "3.4.4", "backend": "pipeline", "content_list_path": "batch_0001/0000017352_0008_1248_1575/auto/0000017352_0008_1248_1575_content_list.json" }
ultra-page-v2-redactions	0000017352_0009	0000017352	9	{ "filename": "0000017352_0009_1248_1575.png", "width": 1248, "height": 1575, "size_bytes": 61338 }	MKULTRA Attached information has been prepared to assist 0 & L auditors ant TSD personnel in processing lULTRA vouchers. Vouchers received from TSD are original. and two. Entries should be placed on all three and they are to be forwarded as follows: Original- use as official voucher. a afficial voucher. lst copy- fi...	MKULTRA Attached information has been prepared to assist 0 & L auditors ant TSD personnel in processing lULTRA vouchers. Vouchers received from TSD are original. and two. Entries should be placed on all three and they are to be forwarded as follows: Original- use as official voucher. a afficial voucher. lst copy- fi...	[ { "marker": "(redacted_27)", "estimated_character_spaces": 27, "estimate_range": [ 22, 32 ], "bbox_pixels": [ 564, 256, 646, 275 ], "width_px": 82, "height_px": 19, "fill_ratio": 0.715, "aspect_ratio": 4.316, "character_pitch_px": 3.005...	[ { "order": 0, "type": "text", "text": "MKULTRA", "bbox": [ 445, 156, 523, 178 ], "page_idx": 0, "text_level": 2 }, { "order": 1, "type": "text", "text": "Attached information has been prepared to assist 0 & L auditors ant TSD personnel in processin...	{ "character_count": 993, "word_count": 160, "block_count": 8, "empty": false, "needs_review": false, "review_reasons": [ "redaction_detected" ] }	{ "engine": "MinerU", "mineru_version": "3.4.4", "backend": "pipeline", "content_list_path": "batch_0001/0000017352_0009_1248_1575/auto/0000017352_0009_1248_1575_content_list.json" }
ultra-page-v2-redactions	0000017352_0010	0000017352	10	{ "filename": "0000017352_0010_1248_1575.png", "width": 1248, "height": 1575, "size_bytes": 75909 }	PROJECTL. MXULTD Research and.Devclopmentciect A Fiscal Annex governsiProject financial procedares Flow Chart: Funding Granlees, Accountinqs and G.L. Accts. AttachmentA Direct to. Grantee Reguest for Payment Dr. 60101 Attachnient B... Thru. Funding Mech. Reguest For Advance Dr.142.9-180.0\| AttachmentC Thru Cotouts I...	PROJECTL. MXULTD Research and.Devclopmentciect A Fiscal Annex governsiProject financial procedares Flow Chart: Funding Granlees, Accountinqs and G.L. Accts. AttachmentA Direct to. Grantee Reguest for Payment Dr. 60101 Attachnient B... Thru. Funding Mech. Reguest For Advance Dr.142.9-180.0\| AttachmentC Thru Cotouts I...	[ { "marker": "(redacted_11)", "estimated_character_spaces": 11, "estimate_range": [ 9, 13 ], "bbox_pixels": [ 352, 1215, 386, 1228 ], "width_px": 34, "height_px": 13, "fill_ratio": 0.655, "aspect_ratio": 2.615, "character_pitch_px": 3.22...	[ { "order": 0, "type": "text", "text": "PROJECTL. MXULTD Research and.Devclopmentciect A Fiscal Annex governsiProject financial procedares Flow Chart: Funding Granlees, Accountinqs and G.L. Accts.", "bbox": [ 140, 59, 928, 186 ], "page_idx": 0 }, { "order": 1, ...	{ "character_count": 1317, "word_count": 175, "block_count": 12, "empty": false, "needs_review": false, "review_reasons": [ "redaction_detected" ] }	{ "engine": "MinerU", "mineru_version": "3.4.4", "backend": "pipeline", "content_list_path": "batch_0001/0000017352_0010_1248_1575/auto/0000017352_0010_1248_1575_content_list.json" }
ultra-page-v2-redactions	0000017352_0011	0000017352	11	{ "filename": "0000017352_0011_1248_1575.png", "width": 1248, "height": 1575, "size_bytes": 63242 }		[REDACTIONS] (redacted_12)	[ { "marker": "(redacted_12)", "estimated_character_spaces": 12, "estimate_range": [ 10, 14 ], "bbox_pixels": [ 272, 224, 378, 245 ], "width_px": 106, "height_px": 21, "fill_ratio": 0.681, "aspect_ratio": 5.048, "character_pitch_px": 9, ...	[ { "order": 0, "type": "image", "bbox": [ 4, 22, 919, 987 ], "page_idx": 0, "img_path": "images/5d5424cd7163f9d31035875f453dc945bbb5523b216a721268f0e5696be7fef3.jpg", "extra": { "image_caption": [], "image_footnote": [] } } ]	{ "character_count": 0, "word_count": 0, "block_count": 1, "empty": true, "needs_review": true, "review_reasons": [ "empty_transcription", "redaction_detected" ] }	{ "engine": "MinerU", "mineru_version": "3.4.4", "backend": "pipeline", "content_list_path": "batch_0001/0000017352_0011_1248_1575/auto/0000017352_0011_1248_1575_content_list.json" }

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MKULTRA FOIA MinerU Archive

The MKULTRA FOIA MinerU Archive is a public-interest research dataset containing 21,237 pages of declassified MKULTRA and related-program records.

The repository contains two separately preserved collections:

Collection	Pages	Source	Page export	Document export
Original PEERS FOIA collection	16,383	TIFF files obtained by PEERS through FOIA and converted to PNG	`pages`	`documents`
Supplemental authenticated declassified collection	4,854	Additional PEERS images and authenticated declassified-document collections	`supplemental-pages`	`supplemental-documents`

Each collection includes page-level and document-level MinerU transcriptions, processing metadata, preliminary analysis, provenance information, and experimental probable-redaction annotations.

The original and supplemental exports are kept separate so that existing users of the original dataset remain unaffected and researchers can clearly identify the provenance of every record.

Dataset Explorer

Use the configuration selector in the Hugging Face Dataset Explorer to browse one of four JSONL datasets:

Configuration	Record unit	Collection
`pages`	One record per scanned page	Original PEERS FOIA collection
`documents`	One record per grouped MORI document	Original PEERS FOIA collection
`supplemental-pages`	One record per scanned page	Supplemental collection
`supplemental-documents`	One record per grouped source document	Supplemental collection

The pages configuration remains the default for backward compatibility.

Collections

Original PEERS FOIA collection

The original collection contains 16,383 pages of MKULTRA-related records obtained by the nonprofit Public Education and Empowerment Resource Service (PEERS) through a Freedom of Information Act request.

The records were supplied as TIFF files. Mark Bailey converted them to PNG in 2018 and preserved them while waiting for document-OCR technology capable of producing useful structured transcriptions.

In 2026, the page images were processed with MinerU to produce page-level and document-level transcriptions, layout-aware output, preliminary corpus analysis, quality metadata, and experimental probable-redaction mapping.

Support for the creation of this dataset was provided by WantToKnow.info, a PEERS website.

Original source-image archive

Download the original 16,383-page PNG archive from the PEERS IPFS gateway

Property	Value
Archive	`ultra_original_pngs.tar.gz`
Size	646.71 MB
Expected image count	16,383
Image format	PNG
Archive CID	`bafybeicwmhqgjer4il2jkbz255ckn4tq2ianfmy42ehmrpih4ef5yrrdd4`
SHA-256	`5438d3e1807eb6422641fdb107a497c54e150baf715fa2d14e6552f992321f95`
Checksum-file CID	`bafkreia4brfhtgf7pqrtm2twxdfsvvw3jlyatcqyzxm7x2w7w2a7gdkiqq`
Archive root	`ULTRApng/`

IPFS URI:

ipfs://bafybeicwmhqgjer4il2jkbz255ckn4tq2ianfmy42ehmrpih4ef5yrrdd4

Page records contain source filenames corresponding to files beneath the archive's ULTRApng/ directory.

Supplemental authenticated declassified collection

The supplemental collection contains 4,854 page images assembled from:

additional PEERS FOIA page images;
declassified MKULTRA and related-program PDF collections;
materials preserved in Black Vault archival collections; and
other authenticated declassified records documented in the source manifest.

PDF pages were rendered to images and combined with existing page images. The final MinerU inputs were normalized to grayscale JPEG, resized without enlargement to a maximum long side of 2,000 pixels, deduplicated, and conservatively screened for blank pages.

Detailed source-level provenance is provided in data/supplemental_source_manifest.csv.

Supplemental source-image archive

Download the 4,854-page supplemental JPEG archive from the PEERS IPFS gateway

Property	Value
Archive	`mkultra_supplemental_images_jpeg.tar.gz`
Expected image count	4,854
Image format	Grayscale JPEG
Maximum long side	2,000 pixels
JPEG quality	88
Archive CID	`bafybeidpkfhkzj7w2eeemr2dpfbcwj545ygynhh7jjqinihxzyserbu3z4`
SHA-256	`000756859d003e001032cf9583c86b873c8c9b5ec2e7620c0532ebbdbf028891`
Checksum-file CID	`bafkreigxuzgbnaorxa6pqhntnkymq2i7om6x7bu5tbcvfiny6gfewcgo54`
Archive root	`pages/`

IPFS URI:

ipfs://bafybeidpkfhkzj7w2eeemr2dpfbcwj545ygynhh7jjqinihxzyserbu3z4

Page records contain source filenames corresponding to files beneath the archive's pages/ directory.

Dataset contents

Across both collections, this release contains:

21,237 scanned archival pages;
four compressed JSONL datasets browsable through Dataset Explorer;
page-level MinerU text and layout-aware content blocks;
document-level grouped transcriptions;
source and record identifiers;
processing and quality metadata;
preliminary corpus analyses;
experimental probable-redaction annotations;
character-space estimates for probable redactions;
source provenance and processing manifests;
scripts and reproducibility notebooks; and
source-image archives distributed through IPFS.

Principal data files

Original collection

File	Description
`data/ultra_pages_v2_redactions.jsonl.gz`	One JSON object per scanned page
`data/ultra_documents_v2_redactions.jsonl.gz`	One JSON object per grouped MORI document
`data/ultra_export_manifest_v2_redactions.json`	Machine-readable export and processing information
`data/preliminary-analysis.json`	Machine-readable preliminary corpus statistics
`data/preliminary-analysis.txt`	Human-readable preliminary corpus summary

Original records preserve the existing MORI document and page identifiers. The legacy page identifier is stored as mori_id, for example 0000017354_0009.

Supplemental collection

File	Description
`data/supplemental_pages_v1_redactions.jsonl.gz`	One JSON object per supplemental page
`data/supplemental_documents_v1_redactions.jsonl.gz`	One JSON object per grouped supplemental source document
`data/supplemental_export_manifest_v1.json`	Machine-readable export and processing information
`data/supplemental_preliminary_analysis.json`	Machine-readable preliminary corpus statistics
`data/supplemental_preliminary_analysis.txt`	Human-readable preliminary corpus summary
`data/supplemental_source_inventory.csv`	Source inventory
`data/supplemental_source_manifest.csv`	Source-level provenance manifest
`data/supplemental_missing_mineru_outputs.csv`	Report of expected source images without matched MinerU output
`data/supplemental_orphan_mineru_outputs.csv`	Report of MinerU outputs without matched source-image entries

Supplemental records use namespaced record_id values so they cannot collide with identifiers in the original collection.

See DATA_FORMAT.md for field descriptions and example records. See manifest.json for the machine-readable release summary and paths to principal files.

Loading with Hugging Face Datasets

Install the library:

pip install datasets

Load the default original page-level dataset:

from datasets import load_dataset

dataset = load_dataset(
    "peers-ai/mkultra-foia-mineru-archive",
    split="train",
)

print(dataset)
print(dataset[0])

Load a specific configuration:

from datasets import load_dataset

original_pages = load_dataset(
    "peers-ai/mkultra-foia-mineru-archive",
    "pages",
    split="train",
)

original_documents = load_dataset(
    "peers-ai/mkultra-foia-mineru-archive",
    "documents",
    split="train",
)

supplemental_pages = load_dataset(
    "peers-ai/mkultra-foia-mineru-archive",
    "supplemental-pages",
    split="train",
)

supplemental_documents = load_dataset(
    "peers-ai/mkultra-foia-mineru-archive",
    "supplemental-documents",
    split="train",
)

Use streaming to inspect records without downloading an entire export first:

from datasets import load_dataset

stream = load_dataset(
    "peers-ai/mkultra-foia-mineru-archive",
    "supplemental-pages",
    split="train",
    streaming=True,
)

first_record = next(iter(stream))
print(first_record)

Reading the compressed JSONL files directly

Each decompressed line is one complete JSON object.

import gzip
import json

path = "data/supplemental_pages_v1_redactions.jsonl.gz"

with gzip.open(path, "rt", encoding="utf-8") as handle:
    first_record = json.loads(next(handle))

print(json.dumps(first_record, indent=2, ensure_ascii=False))

Verifying the source-image archives

Download an archive and its corresponding checksum file into the same directory.

Verify the original PNG archive:

sha256sum -c ultra_original_pngs.tar.gz.sha256

Expected SHA-256:

5438d3e1807eb6422641fdb107a497c54e150baf715fa2d14e6552f992321f95

Verify the supplemental JPEG archive:

sha256sum -c mkultra_supplemental_images_jpeg.tar.gz.sha256

Expected SHA-256:

000756859d003e001032cf9583c86b873c8c9b5ec2e7620c0532ebbdbf028891

Processing environment

Both collections were processed using:

MinerU: 3.4.4
Backend: pipeline
GPU: NVIDIA RTX A6000 with 48 GB VRAM
PyTorch: 2.5.1+cu124

The A6000 reflects the processing environment used for this release. It is not a requirement for reading or using the dataset.

This work could not have been completed without the technical advances made by Seeds of Truth AI, a PEERS program dedicated to harnessing emerging technologies for public benefit.

Repository structure

.
├── README.md
├── LICENSE
├── RIGHTS_AND_PROVENANCE.md
├── DATA_FORMAT.md
├── manifest.json
├── checksums/
├── data/
├── examples/
├── notebooks/
├── reports/
└── scripts/

Experimental redaction mapping

The page-level exports may contain annotations for probable dark redaction regions.

Annotations may include:

pixel-space bounding boxes;
estimated obscured character spaces;
lower and upper estimate bounds;
character-pitch estimates;
pitch-estimation methods;
fill ratios;
aspect ratios;
heuristic confidence values; and
generated markers such as (redacted_12).

These annotations are experimental. They do not reconstruct concealed text and may contain false positives or missed redactions. Dark graphical elements, stamps, borders, photocopy artifacts, and other page features may be misidentified as redactions.

Important findings should be verified against the corresponding source image.

Quality limitations

OCR quality varies across the archive. Handwritten, rotated, degraded, low-contrast, heavily marked, and unusually formatted pages may have incomplete or corrupted transcriptions.

Short or empty transcriptions do not necessarily indicate blank source pages.

Researchers should verify important quotations, names, dates, and claims against the corresponding original image.

The preliminary analyses, quality flags, and redaction annotations are research aids rather than authoritative descriptions of the source records.

Provenance

The original collection was obtained as TIFF files through a Freedom of Information Act request made by the Public Education and Empowerment Resource Service. Mark Bailey converted those files to PNG in 2018.

The supplemental collection combines additional PEERS page images with authenticated declassified-document collections. Individual source groups and their provenance are documented in data/supplemental_source_manifest.csv.

Both image collections were processed with MinerU in 2026.

Additional rights and provenance information is provided in RIGHTS_AND_PROVENANCE.md.

License

The underlying federal records and faithful image conversions are presented as public-domain source material, subject to the possibility that individual pages may contain third-party content.

Original scripts, notebooks, metadata organization, provenance organization, analysis, quality annotations, and experimental redaction annotations are released under the MIT License to the extent applicable.

Commercial use is permitted.

See LICENSE and RIGHTS_AND_PROVENANCE.md.

Suggested attribution

MKULTRA FOIA MinerU Archive, Public Education and Empowerment Resource Service (PEERS). Original TIFF-to-PNG conversion by Mark Bailey, 2018; supplemental image preparation and MinerU processing release, 2026.

Disclaimer

The dataset is provided as-is, without warranty. OCR text, metadata, quality flags, corpus analyses, source classifications, and experimental redaction annotations may contain errors.

Users should consult the original source images before relying on the dataset for quotation, attribution, historical claims, or other consequential research.

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