All that was near fifty year ago. If Nolan was thirty then, he must have been near eighty when he died. He looked sixty when he was forty. But he never seemed to me to change a hair afterwards. As I imagine his life, from what I have seen and heard of it, he must have been in every sea, and yet almost never on land. He must have known, in a formal way, more officers in our service than any man living knows. He told me once, with a grave smile, that no man in the world lived so methodical a life as he. "You know the boys say I am the Iron Mask, and you know how busy he was." He said it did not do for any one to try to read all the time, more than to do anything else all the time; but that he read just five hours a day. "Then," he said, "I keep up my note-books, writing in them at such and such hours from what I have been reading; and I include in these my scrap-books." These were very curious indeed. He had six or eight, of different subjects. There was one of History, one of Natural Science, one which he called "Odds and Ends." But they were not merely books of extracts from newspapers. They had bits of plants and ribbons, shells tied on, and carved scraps of bone and wood, which he had taught the men to cut for him, and they were beautifully illustrated. He drew admirably. He had some of the funniest drawings there, and some of the most pathetic, that I have ever seen in my life. I wonder who will have Nolan's scrap-books. Well, he said his reading and his notes were his profession, and that they took five hours and two hours respectively of each day. "Then," said he, "every man should have a diversion as well as a profession. My Natural History is my diversion." That took two hours a day more. The men used to bring him birds and fish, but on a long cruise he had to satisfy himself with centipedes and cockroaches and such small game. He was the only naturalist I ever met who knew anything about the habits of the house-fly and the mosquito. All those people can tell you whether they are _Lepidoptera_ or _Steptopotera_; but as for telling how you can get rid of them, or how they get away from you when you strike them,--why Linnaeus knew as little of that as John Foy the idiot did. These nine hours made Nolan's regular daily "occupation." The rest of the time he talked or walked. Till he grew very old, he went aloft a great deal. He always kept up his exercise; and I never heard that he was ill. If any other man was ill, he was the kindest nurse in the world; and he knew more than half the surgeons do. Then if anybody was sick or died, or if the captain wanted him to, on any other occasion, he was always ready to read prayers. I have said that he read beautifully.