"The Boy Scouts on Picket Duty" by Robert Shaler is an adventure novel written during the early 20th century. The story revolves around a group of Boy Scouts who embark on a summer expedition, encountering mystery and danger as they become involved in thwarting smugglers operating along the Florida coast. The main characters include Captain Vinton and a group of young scouts, particularly highlighting Hugh, who faces perilous situations that challenge their courage and resourcefulness. The opening of the story sets the scene aboard the sloop "Arrow", where Captain Vinton is on a mission to report suspicious activity from a mysterious steamer seen cruising near the shore. Along with a party of scouts and a Seminole guide, they head toward Key West, fueled by their curiosity and a sense of duty. As they sail, the scouts learn of a potential smuggling operation involving contraband cargo meant for nefarious purposes. The narrative introduces a tense atmosphere as the boys become embroiled in a thrilling chase against the backdrop of the beautiful yet dangerous Florida coastline, hinting at the unfolding adventures that await them. (This is an automatically generated summary.)