It was three days after this that Ned, coming away from a bank the president of which had suggested that some of the Swift loan had better be reduced soon, stopped in at the _Graphic_ office. He presented the slip calling for any replies that might have been received for Mr. Quick of Box 123, and, somewhat to his surprise, he was handed an envelope. The paper was of good quality, though perfectly plain, and the address was neatly printed. “They’re taking no chances of handwriting being traced,” remarked Ned, as he hurried back to the laboratory with the missive. “This may mean business, Tom,” he said to his chum, “or it may be a suggestion from some other paper that you would do well to put the ad in their columns. That’s a newspaper trick, you know.” “I know it is,” assented the young inventor. “However, this may mean business.” He tore the envelope open and he had no sooner scanned the few lines on a single sheet of paper within than he cried: “Hurray!” “Is it from your enemies?” asked Ned. “I think it is. Read it!” Ned let his eyes rove over this: “If Mr. Quick will present himself at a certain house on Rattlesnake Island he will learn something to his advantage. Mr. Quick must present himself absolutely alone. If there is any attempt at trickery all negotiations will be called off and vigorous retaliatory measures at once undertaken. Come this midnight.” “Are you going, Tom?” asked Ned. “I certainly am!” “Alone—and to Rattlesnake Island where we were held prisoners?” cried Ned. “Why not? They won’t try any trick like that again. They’ll know I wouldn’t walk into a trap like that without leaving word where I am bound for and my non-appearance in due time would mean a search. They aren’t such fools as that. I’ll go and see what they have to say. I’ll be there when the clock strikes twelve.” “They aren’t giving you much time for preparation. It’s after two o’clock now.” “It’s all the time I need. I’ve been anticipating this and I’m ready. Now, Ned, I’ll let you into some of my secrets that I’ve been holding out on you.” Thereupon Tom told Ned something which made that young man open his eyes. But even at the end, when the plans were all detailed, the business manager was a bit doubtful. “It’s risky, Tom,” he said. “I’m afraid to have you go there alone to meet these fellows.” “There’s no danger, I tell you. I’m not afraid. My plans have been too carefully made to permit of failure.” But Ned’s face was serious, and when Mr. Swift heard of what his son proposed to do he added his appeals to the young inventor, asking him to try some other and less risky method. “This is the only way,” declared Tom. “I’m going to that midnight meeting.” When the time came, Tom Swift set off in one of his motorboats alone, heading across Lake Carlopa in the darkness, guiding his craft toward the sinister black shape of Rattlesnake Island.