Conversation so far:
What was Muddy Waters' early career like?
In August 1941, Alan Lomax went to Stovall, Mississippi, on behalf of the Library of Congress to record various country blues musicians, including Muddy Waters.
What happened in 1941 to Muddy Waters
In August 1941, Alan Lomax went to Stovall, Mississippi, on behalf of the Library of Congress to record various country blues musicians, including Muddy Waters.

Question: What else was he known for in that year
Self-contained rewrite: What else was Muddy Waters known for in 1941 besides being recorded by Alan Lomax on behalf of the Library of Congress?