Dead Men Tell

Dead Men Tell is a 1941 mystery film starring Sidney Toler, who played Charlie Chan infeature films, beginning with Charlie Chan in Honolulu 1938, and ending with The Trap 1946. The firstCharlie Chan films were produced by 20th Century Fox Studios, thereafter sold to Monogram Pictures.

Charlie Chan Sidney Toler is engaged by an heir to solve a mystery on a boat. Miss Nodbury Ethel Griffies seeks a pirate treasure on Cocos Island, and the ship she uses is an old sailing ship used in the recent past as a museum of pirate lore by one of her relatives. For safety, she has split her map into four pieces, which she gave to some of the passengers whom she has invited to go along with her, but tells no one who they are. When she is given a fright and succumbs to her heart disease Chan must clear up the mystery while the ship is still at the dock.

Source: Wikipedia