The torpedo submarine's inventor, Jack Farnum, is looking for investors to help him kick his new shipyard into high gear...
Captain Jack Benson and Hal Hastings have been sailing in torpedo submarines. There is new danger that they will have to...
The Pollard is about to be taken to Annapolis, where the United States Navy will train their midshipmen how to run the s...
Everyone is waiting for something special that has been promised, the "Benson", the fast submarine built by the Pollard ...
Jack Benson and Hal Hastings arrive in Dunhaven looking for adventure and find out that there is a submarine in the ship...