In the Sargasso Sea by Thomas A. Janvier

Robinson Crusoe's footprint in the sand did not startle him more than that strange lonely cry startled me. Indeed, as between the two of us, I had rather the worse of it: for Crusoe, at least, knew that he was dealing with a reality, while I could not be certain that I was not dealing with a bit of a dream in which there was no reality at all.

For a long while I sat there puzzling over it -- half hoping that I might hear it again, and so be sure of it; and half hoping that I might not hear it, because of the thrilling tone in it which had filled me with a sharp alarm. I was so shaken that I had not the courage to go off to my berth in the cabin, with only a candle to light me there, but stayed on in the little room that the lamp lighted so brightly that there were no dark corners for my fancy to people with things horrible; and so, at last, still scared and puzzled, I went off to sleep in my chair.