On Atlas, fields of moist snow half depend. _5
Girt there with blasts and meteors Tempest dwells
By Nile's aereal urn, with rapid spells
Urging those waters to their mighty end.
O'er Egypt's land of Memory floods are level
And they are thine, O Nile--and well thou knowest _10
That soul-sustaining airs and blasts of evil
And fruits and poisons spring where'er thou flowest.
Beware, O Man--for knowledge must to thee,
Like the great flood to Egypt, ever be.

***


PASSAGE OF THE APENNINES.

[Composed May 4, 1818. Published by Mrs. Shelley, "Posthumous Poems",
1824. There is a copy amongst the Shelley manuscripts at the Bodleian
Library, which supplies the last word of the fragment.]

Listen, listen, Mary mine,
To the whisper of the Apennine,
It bursts on the roof like the thunder's roar,
Or like the sea on a northern shore,
Heard in its raging ebb and flow _5
By the captives pent in the cave below.
The Apennine in the light of day
Is a mighty mountain dim and gray,
Which between the earth and sky doth lay;
But when night comes, a chaos dread _10