Credit Where Credit's Due

All of the covers have come from the Grand Comicbook Database at

One of those places that makes you glad for the Internet.

I found these Aquaman splash pages (um... never mind)  on

This is probably the best of the images I used as a reference for Black Jack, from a story in Adventure Comics #150 (March, 1950).
Adventure 150 splash page
Here's the Sea Demon.
Detective 296 Aquaman splash page
Here's King Yascom.
More Fun 82 Aquaman splash page