Bert Wilson in the Rockies — J. W. Duffield
Bert Wilson on the Gridiron — J. W. Duffield
Bert Wilson, Marathon Winner — J. W. Duffield
Bert Wilson, Wireless Operator — J. W. Duffield
Bert Wilson's Twin Cylinder Racer — J. W. Duffield
Lucile Triumphant — Elizabeth M. Duffield
Peru in the Guano Age / Being a Short Account of a Recent Visit to the Guano Deposits, with Some Reflections on the Money They Have Produced and the Uses to Which It Has Been Applied — A. J. Duffield
Radio Boys in the Flying Service; or, Held For Ransom by Mexican Bandits — J. W. Duffield
Radio Boys in the Secret Service; Or, Cast Away on an Iceberg — J. W. Duffield
The Latin Hymn-writers and Their Hymns — Samuel Willoughby Duffield
The Radio Boys Under the Sea; or, The Hunt for Sunken Treasure — J. W. Duffield
