ideal refuge on a rainy day. The thrilling experience with the sailboats and the mystery of the strange motorboat were soon forgotten.
Phil Cohen and Tony Prito, school chums of the Hardy boys, drifted in during the afternoon, as well as Jerry Gilroy and "Slim" Robinson. This comprised the "gang," of which the two Hardy boys were the leading spirits.
Frank and Joe Hardy were the sons of Fenton Hardy, an internationally famous detective. Mr. Hardy had been for many years a detective on the New York police force, where he was so successful that he went into practice for himself. His two sons already showed signs of inheriting his ability and in a number of instances had solved difficult criminal cases.
The first of these was the mystery of the theft of valuable jewels and bonds from Tower Mansion, an old-fashioned building on the outskirts of Bayport. How the Hardy boys solved the mystery has already been related in the first volume of this series, entitled, "The Tower Treasure."
In the second volume, "The House on the Cliff," the Hardy boys and their chums had a thrilling experience in a reputedly haunted house on the cliffs overlooking Barmet Bay. This was the starting point of an exciting chase for smugglers, in which the Hardy boys
