"We will go to Philadelphia as soon as possible and get the steam yacht ready for the trip. The best way to foil Merrick and his crowd is to find the isle, get possession of the treasure, and get away before they know what we are doing," answered Anderson Rover. On the following day the party was rejoined by Songbird, and then all journeyed to Philadelphia, taking Aleck Pop with them. They found the _Rainbow_ tied up to a dock along the Delaware River, and went aboard. The master of the craft, Captain Barforth, was on hand to greet them, and he speedily made them feel at home. The captain was a big, good natured man of about forty, and the boys knew they would like him the moment they saw him. "Well, this is certainly a swell boat," said Sam, after an inspection. "And as clean as a whistle." "Puts me in mind of the deserted steam yacht we boarded in the Gulf of Mexico," answered Dick, referring to a happening which has been related in detail in "The Rover Boys in Southern Waters." "Wonder if we'll have as many adventures as we did on that boat," mused Dick. "Those were hot times, eh?" "We'll not lack for adventures if we come into contact with Merrick and his gang," answered Songbird, who had been told all the details of the adventures in New York. There were six single and four double staterooms aboard the steam yacht, so the Rovers and their friends were not crowded for accommodations, since even a single room contained two berths, an upper and a lower. Each room was done in white and gold, giving, it a truly aristocratic appearance. There was a good deal of brass and nickel plated work, and the metal shone like a mirror. "I declare it's most too good to use," said Sam, when on a tour of inspection. "This craft must have cost a sight of money." "It did," answered his father. "But the owner is a millionaire so he can well afford it." The boys were as much interested in the machinery as in anything, and they visited the engine room and became acquainted with Frank Norton, the head engineer. They learned that the engine was of the most modern type, and that the _Rainbow_, in spite of her breadth of beam she was rather wide could make twenty to twenty six knots an hour in an ordinary sea. "And we've got a licence to go where we please," added the head engineer proudly. Now that they were aboard the steam yacht the Rover boys were anxious to be sailing. But they were also anxious to greet their friends and they awaited the arrival of the others with interest. Fred Garrison and Hans Mueller came in together, the following noon, Hans lugging a dress suit case that was as big almost as a dog house. "Here we are again!" sang out Fred, dropping his baggage and shaking hands all around. "I declare it's like when we went on the houseboat trip." "Maybe I ton't vos glad to drop dot leetle drunk alretty?" said Hans, indicating his baggage. "He vos veigh most a don, I dink." "Why didn't you let an expressman bring it?" asked Dick.