OK, last chapter up:

There’s a stealth cameo from some other characters, but I’ll say no more.

 1940 (4612 words) by moon_custafer
Chapters: 4/4
Fandom: Mysterious Mr. Quin — Agatha Christie, Norse Mythology
Rating: General Audiences
Warnings: No Archive Warnings Apply
Characters: Mr. Satterthwaite, Mr. Quin - Character, Original Characters
Additional Tags: Battle of Britain
Series: Part 4 of The Bureaucracy of the Otherworld Was Surprisingly Generous When It Came to Transportation