"The Six River Motor Boat Boys on the St. Lawrence; Or, The Lost Channel" by Harry Gordon is a juvenile adventure novel written in the early 20th century. The story follows a group of four boys—Clayton Emmett, Alex Smithwick, Julian Shafer, and Cornelius Witters—who embark on an exciting journey aboard their motorboat, the "Rambler", to explore the St. Lawrence River and uncover a mysterious lost channel. As they encounter challenges, including a mysterious visitor and potential threats, the boys must navigate their adventure with bravery and cleverness. At the start of the book, the boys are anchored on the St. Lawrence River, preparing for their journey when a mysterious man arrives in a canoe to deliver a sealed package. The package contains a crude map and cryptic instructions that hint at treasure tied to a lost charter. As they speculate on its meaning, strange events unfold, including a series of warnings not to interfere with a situation that doesn’t concern them. This encounter sets the stage for the boys' quest filled with adventure, danger, and the thrill of uncovering secrets along the river. (This is an automatically generated summary.)