Deep diving

Free to read here, from Project Gutenberg.

Under the Waves: Diving in Deep Waters

R. M. Ballantyne

Eric

S. B. C. Samuels

The phantom violin

Roy J. Snell

Dutch the Diver; Or, A Man's Mistake

George Manville Fenn

Dave Fearless after a sunken treasure

Roy Rockwood

Life and Adventures of Frances Namon Sorcho

Captain Louis Sorcho Great Deep Sea Diving Co.