From The Perry Mason TV Show Book
Perry rescues a beautiful writer—Diana Carter—from the ocean in his boat and then must dive in and rescue her twice more—in the courtroom. The first time is for jewel theft and the second is for a charge of murder. (What kind of company does this girl keep?)

The evidence to clear Diana lies at the bottom of the ocean, a forged note inside a bottle inside a sunken yacht. Perry pulls this one off, with a lot of help from his good friend Paul.

This is the episode where Diana Carter is so grateful to be cleared that she dedicates her first mystery novel to Paul and titles it The Amorous Adventures of Paul Lake, Private Eye.