From the farm the boys had been sent, some years before, to Putnam Hall, an ideal place of learning, of which we shall learn more as our tale proceeds. What the lads did there on their arrival has already been related in "The Rover Boys at School," the first volume of this series.
A short term at Putnam Hall was followed by a trip on the ocean, and then a long journey to the jungles of Africa, in search of Anderson Rover, who had disappeared. Then came a grand outing out west, and another outing on the great lakes, followed by some stirring adventures in the mountains of New York state.
Coming from the mountains, the three youths had expected to go back to Putnam Hall at once, but fate ordained otherwise and they were cast away in the Pacific Ocean, as related in "The Rover Boys on Land and Sea." They had a hard task of it getting home, and then returned to the school and had some splendid times while in camp with the other cadets.
When vacation was once more at hand the boys soon solved the problem of what to do. Their Uncle Randolph had taken a houseboat for debt. The craft was located on the Ohio River, and it was resolved to make a trip down the Mississippi.
"It will be the best ever!" Tom declared, and they started with much enthusiasm, taking with them "Songbird" Powell, a school chum addicted
