Conversation so far:
What was the Mercury Theatre?
Breaking with the Federal Theatre Project in 1937, Orson Welles and John Houseman founded their own repertory company, which they called the Mercury Theatre
How did Orson Welles come up with the name Mercury Theatre?
The name Mercury Theatre was inspired by the title of the iconoclastic magazine, The American Mercury.

Question: Who else worked with Welles?
Self-contained rewrite: Who else worked with Orson Welles besides John Houseman?