Fenn, George Manville: Gil the Gunner. V1. 30 Sep 2011
 

George Manville Fenn (January 3, 1831, Pimlico - August 26, 1909, Isleworth) was a British writer.
He worked as a teacher in Lincolnshire, until he became printer, editor and publisher of various magazines. He had two sons and six daughters with his wife Susanna Leake, whom he had married in 1855.
He was editor and proprietor of Once a Week from 1873 until its demise in 1879 and then was entirely engaged in writing fiction. Most of his work consists of adventure stories for young readers, featuring Explorers, Smugglers, young Adventurers and Seamen. His adult novels offer critical social commentary on Victorian England, especially reconsidering economic questions.

Excerpt
All at once, away to my right, I saw a hand appear above the surface, and like a flash it came back, and, amidst shrieks and cheers, I swam as hard as I could for the spot, to reach it just as the hand disappeared.