This leads me to speak of my watchmate for nine months--and, taking him all in all, the most remarkable man I have ever seen--Tom Harris. An hour, every night, while lying in port, Harris and myself had the deck to ourselves, and walking fore and aft, night after night, for months, I learned his whole character and history, and more about foreign nations, the habits of different people, and especially the secrets of sailors' lives and hardships, and also of practical seamanship, (in which he was abundantly capable of instructing me,) than I could ever have learned elsewhere. But the most remarkable thing about him, was the power of his mind. His memory was perfect; seeming to form a regular chain, reaching from his earliest childhood up to the time I knew him, without one link wanting. His power of calculation, too, was remarkable. I called myself pretty quick at figures, and had been through a course of mathematical studies; but, working by my head, I was unable to keep within sight of this man, who had never been beyond his arithmetic: so rapid was his calculation. He carried in his head not only a log-book of the whole voyage, in which everything was complete and accurate, and from which no one ever thought of appealing, but also an accurate registry of all the cargo; knowing, precisely, where each thing was, and how many hides we took in at every port. One night, he made a rough calculation of the number of hides that could be stowed in the lower hold, between the fore and main masts, taking the depth of hold and breadth of beam, (for he always knew the dimension of every part of the ship, before he had been a month on board,) and the average area and thickness of a hide; he came surprisingly near the number, as it afterwards turned out. The mate frequently came to him to know the capacity of different parts of the vessel, so he could tell the sailmaker very nearly the amount of canvas he would want for each sail in the ship; for he knew the hoist of every mast, and spread of every sail, on the head and foot, in feet and inches. When we were at sea, he kept a running account, in his head, of the ship's way--the number of knots and the courses; and if the courses did not vary much during the twenty-four hours, by taking the whole progress, and allowing so many eighths southing or northing, to so many easting or westing; he would make up his reckoning just before the captain took the sun at noon, and often came wonderfully near the mark. Calculation of all kinds was his delight. He had, in his chest, several volumes giving accounts of inventions in mechanics, which he read with great pleasure, and made himself master of. I doubt if he ever forgot anything that he read. The only thing in the way of poetry that he ever read was Falconer's Shipwreck, which he was delighted with, and whole pages of which he could repeat. He knew the name of every sailor that had ever been his shipmate, and also, of every