Goodbye, sir, & fare well. You're in the clear
“Nobody” (Mark says you said) “is ever found out.”
I figure you were right
Having as Henry got away with murder
For long. Some jarred clock tells us it's late
See Frost’s January 1, 1937 letter to Louis Untermeyer: “I should like to be so subtle at this game [i.e. poetry] as to seem to the casual person altogether obvious. The casual person would assume that I meant nothing or else I came near enough meaning some thing he was familiar with to mean it for all practical purposes.” 
 “Mark” is presumably Mark van Doren—poet, noted Shakespeare scholar, Berryman’s mentor at Columbia and a friend of Frost’s.
Dream Song 39