Synopsis

Tom Swift, who had been slowly looking through the pages of a magazine, in the contents of which he seemed to be deeply interested, turned the final folio, ruffled the sheets back again to look at a certain map and drawing, and then, slapping the book down on a table before him, with a noise not unlike that of a shot, exclaimed: "Well, that is certainly one wonderful story!" "What's it about, Tom?" asked his chum, Ned Newton. "Something about inside baseball, or a new submarine that can be converted into an airship on short notice?"