After this taste of his quality, Captain Selover enjoyed a quiet ship. We made good time, but for a long while nothing happened. Finally the monotony was broken by an incident. One evening before the night winds I sat in the shadow of the extra dory on top of the deck house. The moon was but just beyond the full, so I suppose I must have been practically invisible. Certainly the Nigger did not know of my presence, for he came and stood within three feet of me without giving any sign. The companion was open. In a moment some door below was opened also, and a scrap of conversation came up to us very clearly. "You haf dem finished?" the doctor's voice inquired. "So, that iss well,"--papers rustled for a few moments. "And the r-result-- ah--exactly--it iss that exactly. Percy, mein son, that maigs the experiment exact. We haf the process----" "I don't see, sir, quite," replied the voice of Percy Darrow, with a tinge of excitement. "I can follow the logic of the experiment, of course--so can I follow the logic of a trip to the moon. But when you come to apply it--how do you get your re-agent? There's no known method----" Dr. Schermerhorn broke in: "Ach, it iss that I haf perfected. Pardon me, my boy, it iss the first I haf worked from you apart. It iss for a surprise. I haf made in small quantities the missing ingredient. It will form a perfect interruption to the current. Now we go----" "Do you mean to say," almost shouted Darrow, "that you have succeeded in freeing it in the metal?" "Yes," replied the doctor simply. I could hear a chair overturned. "Why, with that you can----" "I can do everything," broke in the doctor. "The possibilities are enormous." "And you can really produce it in quantity?" "I think so; it iss for us to discover." A pause ensued. "Why!" came the voice of Percy Darrow, awestricken. "With fifty centigrammes only you could--you could transmute any substance--why, you could make anything you pleased almost! You could make enough diamonds to fill that chest! It is the philosopher's stone!" "Diamonds--yes--it is possible," interrupted the doctor impatiently, "if it was worth while. But you should see the real importance----" The ship careened to a chance swell; a door slammed; the voices were cut off. I looked up. The Nigger's head was thrust forward fairly into the glow from the companionway. The mask of his sullenness had fallen. His eyes fairly rolled in excitement, his thick lips were drawn back to expose his teeth, his powerful figure was gathered with the tensity of a bow. When the door slammed, he turned silently to glide away. At that instant the watch was changed, and in a moment I found myself in my bunk. Ten seconds later the Nigger, detained by Captain Selover for some trifling duty, burst into the forecastle. He was possessed by the wildest excitement. This in itself was enough to gain the attention of the men, but his first words were startling.