William Joseph Cosens Lancaster (1851-1922) was a civil engineer who specialised in seas and harbours. He wrote Juvenile Adventures under the pseudonym Harry Collingwood. His works include: The Secret of the Sands (1879), Under the Meteor Flag: Log of a Midshipman During the French Revolutionary War (1884), The Voyage of the Aurora (1885), The Pirate Island: A Story of the West African Coast (1885), The Congo Rovers: A Story of the Slave Squadron (1886), The Log of the Flying Fish: A Story of Aerial and Submarine Peril and Adventure (1887), The Rover's Secret: A Tale of the Pirate Cays and Lagoons of Cuba (1888), The Missing Merchantman (1889), The Doctor of the Juliet (1892), Jack Beresford's Yarn (1896), For Treasure Bound (1897), The Log of a Privateersman (1897), The Homeward Voyage (1897), An Ocean Chase (1898), A Pirate of the Caribbees (1898), The Castaways (1899), Across the Spanish Main (1906), Dick Leslie's Luck (1906), Geoffrey Harrington's Adventures (1907), Blue and Grey (1908), With Airship and Submarine (1908), A Middy in Command: A Tale of the Slave Squadron (1909) and Two Gallant Sons of Devon (1913).