Complex sentence: The location of the treasure is marked by Flint on a map and entrusted to his first mate William "Billy" Bones, and later it falls into the hands of the hero of the novel, Jim Hawkins.
Split into simpler sentences: The location of the treasure is marked by Flint on a map and entrusted to his first mate William "Billy" Bones. It later falls into the hands of the hero of the novel, Jim Hawkins.