I'm reading every Aquaman solo adventure in publication order. After I read each story I will post the cover/splash page and a few thoughts on the story.
Adventure #215 (August 1955) - The Aqua-Mailman
Some crooks learn that Aquaman is helping a postal carrier make ocean deliveries and decide to take advantage.
Finny Friends Report: Aquaman has a whale carry the quonset hut out of the harbor under water. Aquaman has swordfish drill a hole in the iceberg so Aquaman can reach the bridge of the sunken ship.
Also, while not specifying what sea creatures he's referring to, Aquaman threatens to throw the bad guys to his finny friends if they don't talk.
Glove Color: Green.
Aqua-Exclamations: "There's more than one way to skin a catfish!"
Quotefile: Opening Text Box: "Neither wind, nor rain, not the dangers that teem within the seven seas can stay that new and unique service, the Marine Mail Delivery, from making its appointed rounds... especially when Aquaman, king of the waves, trades in his sea-crown for a postman's cap, to become... The Aqua-Mailman"
Aquaman last delivered mail in Adventure #131. That plot also involved a postal carrier attempting to win a franchise to deliver the mail, but the motives of the bad guys in this story were completely different.
Aquaman first becomes suspicious when the bad guys set up a weather station in an area surrounded by mountains. Then he figures out something is up when he notes the sunken ship that was supposed to be a two-master actually has a third mast that was knocked away and not easily visible to divers. It's a thin thread, and that makes the story a bit hard to buy.
Have you read this story? What do you think?