ideal instrument of my own imagining, to which, in my own mind, I gave the name of the Philosopher's Pendulum. To this invention I owe the quietude of mind which has supported me for many years, and which, as you see, I now enjoy. I said to myself that my great sorrow—if I may so call it without presumption—had arisen merely from my wish to be extraordinarily happy. When, in his dreams, a man has carried presumption so far as to attain to the heights of celebrity, or to being the husband of Ellen Gilmore, there was nothing wonderful if, on awaking, he sustained a heavy fall before reaching the depths of reality. Had I been less ambitious in my desires, their realization would have been easier, or, at any rate, the disappointment would have been less bitter. Starting from this principle, I arrived at the logical conclusion that the best means to avoid being unhappy is to wish for as little happiness as possible. This truth was discovered by my philosophical forefathers many centuries before the birth of Christ, and I lay no claim to being the finder of it; but the outward symbol which I ended by giving to this idea is—at least I fancy it is—of my invention.
"Give me a sheet of paper and a pencil," he added, turning to his friend, "and with a few lines I can demonstrate clearly the whole thing."
Hermann handed him what he wanted without a word. Warren then began gravely to draw a
