"The Radio Boys Under the Sea; or, The Hunt for Sunken Treasure" by J. W. Duffield is a novel written in the early 20th century. This adventurous story focuses on a group of young characters, known as the Radio Boys, who embark on a quest for lost treasure connected to a sunken pirate ship. The narrative unfolds around their encounters, both thrilling and perilous, as they take to the sea in search of their fortune. The opening of the story captures a dramatic moment when Phil Strong, one of the Radio Boys, saves a man from a runaway horse, showcasing the bravery and camaraderie that define the group. Shortly thereafter, they meet Jack Benton, a former Marine with a mysterious treasure map that leads to an adventure involving sunken treasure in the Caribbean Sea. As they prepare for this thrilling journey, they face challenges, including a lurking half-breed antagonist, the realities of sailing, and the trials of a treacherous storm. The boys show their expertise in radio technology while forging new friendships, setting the stage for an exciting quest that promises danger, discovery, and adventure. (This is an automatically generated summary.)