THREE:It was not, however, in any of these concessions that the Stoics found from first to last their most efficient solution for the difficulties of practical experience, but in the countenance they extended to an act which, more than any other, might have seemed fatally inconsistent both in spirit and in letter with their whole system, whether we choose to call it a defiance of divine law, a reversal of natural instinct, a selfish abandonment of duty, or a cowardly shrinking from pain. We allude, of course, to their habitual recommendation of suicide. If you are not satisfied with life, they said,31 you have only got to rise and depart; the door is always open. Various circumstances were specified in which the sage would exercise the privilege of taking himself off, as they euphemistically expressed it. Severe pain, mutilation, incurable disease, advanced old age, the hopelessness of escaping from tyranny, and in general any hindrance to leading a natural life, were held to be a sufficient justification for such a step.71 The first founders of the school set an example afterwards frequently followed. Zeno is said to have hanged himself for no better reason than that he fell and broke his finger through the weakness of old age; and Cleanthes, having been ordered to abstain temporarily from food, resolved, as he expressed it, not to turn back after going half-way to death.72 This side of the Stoic doctrine found particular favour in Rome, and the voluntary death of Cato was always spoken of as his chief title to fame. Many noble spirits were sustained in their defiance of the imperial despotism by the thought that there was one last liberty of which not even Caesar could deprive them. Objections were silenced by the argument that, life not being an absolute good, its loss might fairly be preferred to some relatively greater inconvenience.73 But why the sage should renounce an existence where perfect happiness depends entirely on his own will, neither was, nor could it be, explained.Marine and railway engineering have engrossed the best talent in the world; investigation and research has been expended upon these subjects in a degree commensurate with their importance, and it would be hard to suggest a single want in the many able text-books that have been prepared upon the subjects. Marine and railway engineering are sciences that may, in a sense, be separated from the ordinary constructive arts, and studied at the end of a course in mechanical engineering, but are hardly [61] proper subjects for an apprentice to take up at the beginning.