The Young Wireless Operator—Afloat Or, How Roy Mercer Won His Spurs in the Merchant Marine

The Young Wireless Operator—As a Fire Patrol Or, The Story of a Young Wireless Amateur Who Made Good as a Fire Patrol

The Young Wireless Operator—With the Oyster Fleet How Alec Cunningham Won His Way to the Top in the Oyster Business

The Wireless Operator—With the U. S. Coast Guard

The Young Supercargo: A Story of the Merchant Marine