In 2061 : odyssey three / Arthur C. Clarke, main character Heywood Floyd remembers that line of poetry from something he had studied in college.
According to Clarke's prediction of technology, Clarke states
With no further clues, it might take the station Computer quite a while -- perhaps as much as ten minutes -- to locate the line in the whole body of English literature.
(From the beginning of chapter 7)
Google, searching 49 years before 2061, but 25 years after Clarke wrote those words, found about 65 results in about 1/8 of a second.
I have not read far enough in the book to determine if he is remembering the same poem(s) that Google found.
As Yogi Berra once put it, "The future ain't what it used to be."
Comment from Sarah Louise 15 November 2012 at 18:31:
What poem did you use?
My reply to that:
The poem, Farewell / by Robert Nichols, can be found at First World War.com