Conversation so far:
What is Fats most famous song?
40 ("Red Sails in the Sunset", 1963).
What did he leave Imperial?
CANNOTANSWER.
Where did he go after he left Imperial?
1970, leaving ABC-Paramount in mid-1965 and recording for Mercury Records.

Question: What songs did he release through Mercury?
Self-contained rewrite: What songs did Fats Domino release through Mercury Records?