I listened to an old radio show, "THE ADVENTURES OF SAM SPADE, DETECTIVE," starring Howard Duff pictured here. This episode, "The Dead Duck Caper," originally ran on CBS (Wildroot Cream Oil was the sponsor) on February 2, 1947. This version was from a vinyl record made by the Armed Forces Radio Services which includes the scratchy background. The baritone Duff sounds like a real-life Spade. The bad guy had a quacky voice like a duck's. I had a little trouble following the plotline perhaps because the recording was so bad. The snappy dialogue and corny narrative were funny. I guess it was closer to being a radio comedy than suspenseful adventure. I recently read a bio. of Hammett, and he wrote a lot of radio scripts, but I don't know if he wrote this particular episode or not. If I run across any other recorded episodes, I might give them a listen like while I am working out.