Dave Fearless after a sunken treasure : $b or, The rival ocean divers

"Dave Fearless after a Sunken Treasure: or, The Rival Ocean Divers" by Roy Rockwood is an early 1900s adventure for young readers that follows Dave Fearless, a brave young man, and his father, Amos, as they hunt for a sunken treasure. They aren't the only ones searching; the Hankers family are their rivals, creating challenges for Dave and his father, including dangerous sea creatures. When Bart Hankers finds out about their plans to find the million-dollar treasure hidden in the wreck of the "Happy Hour," he goes head-to-head with Dave, kicking off a series of underwater explorations and clever plans to see who will find the fortune first.