There was one professional subject, "Naval Fleet Tactics" under sail, which at the end of my time shone forth with a kind of sunset splendor, the dying dolphin effect curiously characteristic of the passing period in which we were. This had always had a recognition--_d'estime_, as the French say; but in my final year it fell into the hands of a new instructor, who proceeded to glorify it by amplification. He was a very accomplished man in his profession, a student of it in all its branches, though there was among us a certain understanding that he was not an eminently practical seaman; and he eventually lost his life in what appeared to me a very unpractical manner, being where it did not seem his business to be, and doing work which a junior would probably have done better. We remember William III. at the battle of the Boyne. "Your majesty, the Bishop of Derry has been killed at the ford." "What business had he to be at the ford?" was the unsympathetic answer. The text-book used by our new instructor was by a French lieutenant, written in the thirties of the century, and characterized by something of the peculiar French naval genius. The simpler changes of formation were so simple that complication could not be got into them; but, that happy stage past, we went on to evolutions of huge masses of ships in three columns, in which the changes of dispositions, from one order to another, became subjects of trigonometrical demonstration, quite as troublesome as Euclid. Sines, cosines, and tangents, of fractional angles figured profusely in the processes; and in the result courses to be steered would be laid down to an eighth of a point, when to keep a single vessel, let alone a column, steady within half a point[5] was considered good helmsmanship. There being no translation of the book, our text was provided by copying, individually, from a manuscript prepared by our teacher, which increased our labor; but, curiously enough, the effect of the whole procedure was so to magnify the subject as materially to increase the impression upon our minds.