"The Sportsman's Club Afloat" by Harry Castlemon is a novel written in the late 19th century. It continues the adventures of a group of young boys who make up the Sportsman's Club, focusing on their daring escapades at sea. The opening of this installment sets the stage for a thrilling pursuit involving smugglers and captures, with notable characters like Walter Gaylord, Chase, and Craven driving the plot forward as they embark on a rescue mission. At the start of the novel, Walter and his crew are embroiled in a tense situation with a revenue cutter that mistakenly accuses their yacht, the Banner, of being involved in smuggling activities. The crew learns that fellow club member Fred Craven is in peril, having been captured by smugglers. As they head to Lost Island to rescue him, they encounter more danger when two deserters attempt to take control of their yacht. The narrative is filled with suspense, camaraderie, and the boys' determination, especially Walter's leadership as they navigate a treacherous gulf in an attempt to uncover the smugglers' secrets and rescue their friend. (This is an automatically generated summary.)