The next two days brought no result. The wave-measuring machine would tell where the waves came from, but it would do nothing towards separating them. Day after day the reflectoscopes were watched for the expected sinking of the German ship, but without avail. Change after change was made in the Denckel apparatus, in the hope that the next alteration might be the right one, and that it might come in time to place the man, before the next battleship went down. Saturday afternoon, the last day of the week in which the man was to sink the German battleship, we sat as usual in the laboratory. The last adjustment had been as unsuccessful as the rest, and Tom and Dorothy sat in deep thought, while Jones was scraping the insulation from some wire at one side. “If we only had that manuscript,” said Tom, for the thousandth time, “but failing it, let’s have another try. Jones, will you bring me that manuscript? I mean the old table of wave constants we made up last winter.” “That’s it,” remarked Dorothy. “His mind is so intent on the manuscript that he ordered it instead of soup the other day.” To that maelstrom of papers, his desk, Jones turned to find the needed table of constants, and, after watching his efforts for a few minutes, Tom turned to Dorothy. “Find it, will you, Dorothy? I imagine it’s there.” Dorothy took command, as Tom and I sat in silence. Suddenly Dorothy’s clear voice rang out. “Look, look!” and she came rushing across the room to us, holding aloft a big brown paper package, followed by Jones. “It’s here, it’s here! Mr. Jones had it in his desk, and forgot to give it to you.” Tom cast one look of scorn on the apologetic Jones, as he came slowly forward. “You immortal id--” he began, but Dorothy put her hand over his mouth. “Never mind, dear, it’s here. Don’t waste time. Open it, and see what it says.” Scarcely five minutes passed, when Tom cried, “Here it is,” and read rapidly in German to his assistants. “We can have it in shape in an hour. There’s just that one missing part that threw us completely off,” he ended. He looked at his watch. “Five o’clock by London time, and sometime before twelve, if the man does as he said he would, the German battleship will be destroyed, if it’s not gone already. We’ve got to hustle.”