6 o'clock
`` Father and I have suspected what the game was , and that was why I told the cowboy to say nothing . '' `` Good , '' said Mr. Temple , approvingly . `` Now , Jack , that the mystery of the airplane 's disappearance has been cleared up , we are ready to leave at once . We can get out of New York City on the 6 o'clock train tonight . Look for us Friday . I 'll say good-bye until then , and let the boys speak to you , for I know they are dying to do so . '' While the boys and Jack conversed , Mr. Temple sought out his wife .