"Exactly," assented the skipper.  "Yet it is nothing of the kind; for with my own eyes I saw it drawn from memory by a man whom I happened to meet in one of the third-rate hotels in Freetown, which are frequented by the masters and mates of palm-oil traders and the like.  I happened to hear him mention that he had been in and out of the Fernan Vaz at least a dozen times, in his search for cargo along the coast, so I waited until the people with whom he was talking had left him, and then I entered into conversation with him, finally inducing him to furnish me with this sketch."