"Be explicit, or forever hold your peace," Tommy laughed. "Can't you see the man reaching for his handcuffs?" But Monsieur, thoroughly aroused, waved the crisp bills with a great show of indignation, crying: "If there is a way to run this cheat to earth I, alone, will know it! Then you will want me to be telling you! For my own pleasure I have made a study of counterfeiters and their methods. Perhaps it may surprise you to learn that the police of Europe come to Bucharest and consult with me, eh? Thus, if I may also help you, I must retain my bills!" We laughed, although I felt tremendously proud of the professor, having had no idea he was such a wonder; and Hardwick said, bowing: "Then help yourself so I, also, may be helped. But let me take one for my government and, when you finish with the other, mail it to me with your report. I shall appreciate your assistance, really." Monsieur was delighted. They left us then, and again we settled about the cockpit; each waiting for one of the others to begin. My own thoughts were like a whirlwind, and my ears strained with listening toward the black Gulf--listening for a voice, or the unnamable noise of the gods knew what, that might float to me across the water. I think Tommy half expected me to suggest that we take one of the small boats, and went to his room to put on darker clothes. In a few minutes Monsieur yawned and followed him--though I rather suspected that his yawn was caused more by nervousness than the want of sleep. A moment later Gates, standing near the wheel, softly called my name, so I arose and went to him. It must be remembered that Gates was absolutely dependable. There were no frills about the old skipper, he shared not one superstitious sentiment in common with Tommy, and it is extremely doubtful if he knew the sensation of fear; therefore, when I saw his face, I was astonished, and in alarm asked: "Are you ill?" "No, sir, but I'm sore upset. Please come a bit more aft, sir." Taking a few steps till we were abaft the traveler, he turned and whispered: "Mr. Jack, someone's been trying to blow us up!" CHAPTER VII A BOMB AND A DISCOVERY It seemed that either Gates or I must be out of our senses. "Blow us up!" I gasped, staring at him. "As sure as you're born, sir! 'Twas about the time you called over the rail. A little before that, as you gentlemen were talking, I heard a small boat. She came near, and she came up sneaking. First I thought it might be a sponge fisher with more curiosity than manners, but as she didn't start on again I begun to cock my ear. Then something gave a rub against our rudder post. I didn't like it. I was sitting back there, anyhow, so just got to my hands and knees, and peeped over." "Why didn't you challenge?"