This was shared in another OTR group I’m in. An episode of I Love a Mystery, tentatively dated 1951-06-26 was found on a university library site. According to members of the group, the original 1940s version of this episode is circulating but not this later Mutual version. Chapter 8 of The Pirate Loot of the Island of Skulls. You ILaM fans may appreciate it!
Ryan