Sonnet To The Nile

Son of the old Moon-mountains African!
  Chief of the Pyramid and Crocodile!
  We call thee fruitful, and that very while
A desert fills our seeing's inward span:
Nurse of swart nations since the world began,
  Art thou so fruitful? or dost thou beguile
  Such men to honour thee, who, worn with toil,
Rest for a space 'twixt Cairo and Decan?
O may dark fancies err! They surely do;
  'Tis ignorance that makes a barren waste
Of all beyond itself. Thou dost bedew
  Green rushes like our rivers, and dost taste
The pleasant sunrise. Green isles hast thou too,
  And to the sea as happily dost haste.