"You needn't tell me," I said. "I know exactly what it will do, by instinct. Going uphill it will jamb the wheel so effectively that we shall have to carry the machine bodily. The air at the top of the hill will do it good, and it will suddenly come right again. Going downhill it will start reflecting what a nuisance it has been. This will lead to remorse, and finally to despair. It will say to itself: 'I'm not fit to be a brake. I don't help these fellows; I only hinder them. I'm a curse, that's what I am;' and, without a word of warning, it will 'chuck' the whole business. That is what that brake will do. Leave it alone. You are a good fellow," I continued, "but you have one fault." "What?" he asked, indignantly. "You have too much faith," I answered. "If you read an advertisement, you go away and believe it. Every experiment that every fool has thought of in connection with cycling you have tried. Your guardian angel appears to be a capable and conscientious spirit, and hitherto she has seen you through; take my advice and don't try her too far. She must have had a busy time since you started cycling. Don't go on till you make her mad." He said: "If every man talked like that there would be no advancement made in any department of life. If nobody ever tried a new thing the world would come to a standstill. It is by--" "I know all that can be said on that side of the argument," I interrupted. "I agree in trying new experiments up to thirty-five; _after_ thirty-five I consider a man is entitled to think of himself. You and I have done our duty in this direction, you especially. You have been blown up by a patent gas lamp--" He said: "I really think, you know, that was my fault; I think I must have screwed it up too tight." I said: "I am quite willing to believe that if there was a wrong way of handling the thing that is the way you handle it. You should take that tendency of yours into consideration; it bears upon the argument. Myself, I did not notice what you did; I only know we were riding peacefully and pleasantly along the Whitby Road, discussing the Thirty Years' War, when your lamp went off like a pistol-shot. The start sent me into the ditch; and your wife's face, when I told her there was nothing the matter and that she was not to worry, because the two men would carry you upstairs, and the doctor would be round in a minute bringing the nurse with him, still lingers in my memory." He said: "I wish you had thought to pick up the lamp. I should like to have found out what was the cause of its going off like that." I said: "There was not time to pick up the lamp. I calculate it would have taken two hours to have collected it. As to its 'going off,' the mere fact of its being advertised as the safest lamp ever invented would of itself, to anyone but you, have suggested accident. Then there was that electric lamp," I continued. "Well, that really did give a fine light," he replied; "you said so yourself."