The word athirst appears in the following sentences from Moby-Dick:
Chapter 1 > Paragraph 6 > Sentence 6:
Should you ever be athirst in the great American desert, try this experiment, if your caravan happen to be supplied with a metaphysical professor.
Chapter 6 > Paragraph 3 > Sentence 2:
There weekly arrive in this town scores of green Vermonters and New Hampshire men, all athirst for gain and glory in the fishery.
Chapter 41 > Paragraph 7 > Sentence 1:
And as if the now tested reality of his might had in former legendary times thrown its shadow before it; we find some book naturalists—Olassen and Povelson—declaring the Sperm Whale not only to be a consternation to every other creature in the sea, but also to be so incredibly ferocious as continually to be athirst for human blood.
Concordance for the word Athirst from Moby-Dick.