The Adventures of Captain Horn by Frank R. Stockton

When the brig _Miranda_ was lying at anchor in the Rackbirds' cove, and Mr. George Burke had silently left her in order to go on shore and pursue some investigations in which he was interested, his departure from the brig had not been, as he supposed, unnoticed. The big, good-natured African, known as Inkspot, had been on watch, and, being himself so very black that he was not generally noticeable in the dark, was standing on a part of the deck from which, without being noticed himself, he saw a person get over the taffrail and slip into the water. He knew this person to be the second mate, and having a high respect and some fear of his superiors, he did not consider it his business to interfere with him. He saw a head above the water, moving toward the shore, but it soon disappeared in the darkness. Toward the end of his watch, he had seen Mr. Burke climb up the vessel's side as silently as he had gone down it, and disappear below.

When Inkspot went to his hammock, which he did very shortly afterwards, he reflected to the best of his ability upon what he had seen. Why did Mr. Burke slip away from the ship so silently, and come back in the same way? He must have gone ashore, and why did he want no one to know that he had gone? He must have gone to do something he ought not to do, and Inkspot could think of nothing wrong that Mr. Burke would like to do, except to drink whiskey. Captain Horn was very particular about using spirits on board, and perhaps Mr. Burke liked whiskey, and could not get it. Inkspot knew about the storehouse of the Rackbirds, but he did not know what it had contained, or what had been left there. Maka had said something about the whiskey having been poured out on the sand, but that might have been said just to keep people away from the place. If there were no whiskey there, why did Mr. Burke go on shore?