Rathborne was affiliated with various dime novel publishers over the course of four decades, but most strongly associated with Street & Smith, with whom he spent 20 years as author and editor.
He probably used at least 30 different pen names in his career as a dime novelist, and more than 20 others during his years of series book writing.
Poor documentation of his pseudonyms makes the attribution of his works occasionally difficult, and the full extent of his published writings may never be known.
[1] Rathborne wrote under many names, including Harrison Adams, Hugh Allen, Oliver Lee Clifton, Duke Duncan, Aleck Forbes, Lieutenant Keene, Marline Manly, Mark Merrick, Marne Miller, Warne Miller, Harry St. George, W. B. Lawson, Dash Dale, Col. Lawrence Leslie, Jack Howard, Ward Edwards, Old Broadbrim, Jack Sharpe, Major Andy Burton, A Private Detective, Alex.
Robertson, M.D., Herbert Carter, Gordon Stewart, John Prentice Langley, Louis Arundel and Col. J.M.