The River Motor Boat Boys on the Yukon_ The Lost Mine of Rainbow Bend
The River Motor Boat Boys on the Rio Grande_ In Defense of the Rambler
The River Motor Boat Boys on the Ohio; Or, The Three Blue Lights
The River Motor Boat Boys on the Colorado; Or, The Clue in the Rocks
The River Motor Boat Boys on the Columbia; Or, The Confession of a Photograph
The River Motor Boat Boys on the Amazon; Or, The Secret of Cloud Island
The River Motor Boat Boys on the Mississippi; Or, On the Trail to the Gulf
The Six River Motor Boat Boys on the St. Lawrence; Or, The Lost Channel
