Even the "rule of the road," that most essential part of all a seaman's education, though it be found in a set of iron-bound articles, is apt to vanish entirely away from a man who has only studied it in book form. When the examiner hands him a model, and telling him to imagine himself in command of her, places other models at various angles to her course, asks him what he would do, he will, if his knowledge be theoretical, surely find it depart from him in his sore need, and leave him dumb and witless. And so it will be with all the various branches of seamanship. The ordeal of a _vivâ voce_ examination is too great for any mere theorist to come through successfully--and failure means not only a forfeiture of fees, but a compulsory going to sea again for six months before the next presentation for questioning. The navigation, on the other hand, is considered so much less important that failure to pass that part of the examination carries with it only forfeiture of fees, and a space of three months before appearing again, during which time the candidate may remain on shore at school. Let us suppose, however, that our young aspirant has so well prepared himself that he has gone flying through his first examination, emerging a full-fledged second mate. In that case, as already remarked, much will depend upon his position with regard to influential friends among ship-owners or vacancies in the firm with which he has served his apprenticeship. So many are the difficulties, so varied are the conditions under which the young officer works his way upward, that it is impossible to speak definitely as to the length of time that will elapse before he again approaches the dread tribunal for another inquisition as to his qualifications for the post of "first mate." Since I left the sea there have been several modifications in this matter. One of the most important--made certainly as a concession to the needs of officers in steamships--is that a man with two years' service as second mate, having in the meantime passed his first mate's examination, may pass his examination for master, although he has never served as first mate. This, in view of the almost invariable rule in steamships that a man must have a certificate of higher grade than the one he intends to serve in, is no more than bare justice. And much as we who have been through the grinding of the sailing-ship mill may gird at it, there can be little doubt that before very long it will be found impossible to insist upon the candidate having served his time in sailing ships. The sailing ship has not gone yet, by a very long way, as one visit to the docks will show any one who cares to inquire; but the day of her extinction is within measurable distance. If once the Panama or other interoceanic canal connecting the Atlantic with the Pacific becomes an accomplished fact, sailing ships will be worth old iron price, and no more.