Submarine Boys

The Submarine Boys, by Victor G. Durham, is a series of adventure books for boys, published by Henry Altemus Company, Philadelphia, Pennsylvania, from 1909 through 1920. The series featured three sixteen-year-old boys and their underwater adventures.
Victor G. Durham was most likely a pen name, possibly of H. Irving Hancock. He is also referred to as "Lieutenant-commander Victor G. Durham" 
Content.
Characters in the series include: David Pollard, an 'innovator'; Jacob Farnum, a shipbuilder; Jack Benson, the captain; and Hal Hastings, Eph Somers and Williamson, all crew.
Submarines in the series include the "Pollard", the "Farnum", the "Benson", the "Hastings", the "Somers" and the "Spitfire".