And like dim shadows watch by her sepulchre.
2.
The chill rain is falling, the nipped worm is crawling,
The rivers are swelling, the thunder is knelling
For the Year;
The blithe swallows are flown, and the lizards each gone
To his dwelling;
Come, Months, come away;
Put on white, black, and gray;
Let your light sisters play—
Ye, follow the bier
Of the dead cold Year,
And make her grave green with tear on tear.
This is another inventive idea, typical of Shelley, in which the tears of the grieving months water and nourish the grave, so that it turns green once more in Spring. 
 Note the monosyllables and long vowels in ‘grave’, ‘green’ and ‘tear’, suggesting slowness and sadness. 

Autumn: A Dirge