It was about nine o'clock in the morning, I remember, for just then the captain called to me to stand by the chronometer while he took his fore observation. Captain Hackstaff wasn't one of those old skippers who do everything themselves with a pocket watch, and keep the key of the chronometer in their waistcoat pocket, and won't tell the mate how far the dead reckoning is out. He was rather the other way, and I was glad of it, for he generally let me work the sights he took, and just ran his eye over my figures afterwards. I am bound to say his eye was pretty good, for he would pick out a mistake in a logarithm, or tell me that I had worked the "Equation of Time" with the wrong sign, before it seemed to me that he could have got as far as "half the sum, minus the altitude." He was always right, too, and besides he knew a lot about iron ships and local deviation, and adjusting the compass, and all that sort of thing. I don't know how he came to be in command of a fore-and-aft schooner. He never talked about himself, and maybe he had just been mate on one of those big steel square-riggers, and something had put him back. Perhaps he had been captain, and had got his ship aground, through no particular fault of his, and had to begin over again. Sometimes he talked just like you and me, and sometimes he would speak more like books do, or some of those Boston people I have heard. I don't know. We have all been shipmates now and then with men who have seen better days. Perhaps he had been in the Navy, but what makes me think he couldn't have been, was that he was a thorough good seaman, a regular old windjammer, and understood sail, which those Navy chaps rarely do. Why, you and I have sailed with men before the mast who had their master's certificates in their pockets--English Board of Trade certificates, too--who could work a double altitude if you would lend them a sextant and give them a look at the chronometer, as well as many a man who commands a big square-rigger. Navigation ain't everything, nor seamanship either. You've got to have it in you, if you mean to get there.