Mary Marvel: I found the story when I saw the issue of Wow. The story was cut by a page.
Captain Midnight: I misread "Casey James" as "Casey Jones" and zoned on the Captain Midnight line, reading it as Captain Marvel. Casey James is a recurring character (he's building a transcontinental railway) in Captain Midnight.
The "Captain Marvel Traps a Sleepwalker" story's issue I scrambled as I turned my original list into HTML for the blog; darkmark pointed out the error. And darkmark supplied the three Don Winslow stories' publication info.
Now that I've looked through the relevant Timely issues, I'll say that all ten Captain America stories that I couldn't identify from December 1945 through March 1946 (in other words, all except "The Last Case of Inspector Leeds" in CA 60) went unpublished, as darkmark in his comment on the post about February 1946 surmised (he helped me see those issues).
|8 pg||Mary Marvel||juvenile delinquent double|
|7 pg||"Trouble on the Double" Wow 41, Feb/46|
|9||Don Winslow||trail of the S-29|
|"On the Trail of the S-29" DW 24, May/46|
|8||Don Winslow||Hollywood goes to the Pacific|
|"Hollywood Bound" DW 44, Apr/47|
|7||Captain Midnight||Casey James in swamp|
|9||Don Winslow||dynamite ship|
|"The Good Ship SS Courageous" DW 49, Sept/47|
|7||Captain Marvel||traps a sleepwalker|
|"CM Traps a Sleepwalker" CM Advs 71, Apr/47|