"Port Royal" was written for Escape by Gil Doud. The story was "suggested" to him by events in the book I Dive For Treasure (1942) by Lt. Harry E. Rieseberg. I Dive for Treasure is a romanticized retelling of Rieseberg's own adventures as a treasure hunter. How far from reality does that take us? Far enough.
Lt. Harry E. Rieseberg was a prolific author who wrote a number of books about his underwater experiences with treasure, sunken ships, and sea creatures.
As the episode opens, a hoodlum named Danny Quinn explains how he obtained possession of a stolen chart belonging to the renowned treasure hunter, Fletcher Travis (Rieseberg). When Danny returns the chart, Travis shows his gratitude by allowing Danny to join their expedition to Port Royal, Jamaica. The goal of their voyage is to recover millions in gold from the warehouses of the sunken city, and Danny wants it all!
Will Danny get his hands on Port Royal's lost treasure, or will he get what is really coming to him?
"Port Royal" was written by Gil Doud and produced/directed William N. Robson. Charles McGraw played Danny Quinn and John Dehner played Fletcher Travis. Also appearing were William Conrad, Dee Tatum, Paul Frees, and Ted de Corsia. This episode aired on March 10, 1950.
(Image from the 1954 edition of I Dive For Treasure.)