Ralph, the Train Dispatcher: or, The Mystery of the Pay Car

Fred Fenton Marathon Runner / The Great Race at Riverport School

The Radio Boys at the Sending Station / Making Good in the Wireless Room

Fred Fenton on the Crew / or, The Young Oarsmen of Riverport School

The Radio Boys' First Wireless / Or Winning the Ferberton Prize

The Radio Boys Trailing a Voice / or, Solving a Wireless Mystery