Conversation so far:
What was mirror man?
In 1971 some of the recordings done for Buddah were released as Mirror Man.
Is there anything notable about the album?
bearing a liner note claiming that the material had been recorded in "...one night in Los Angeles in 1965".
Why was it recorded in only one night?
This was a ruse to circumvent possible copyright issues.

Question: Why did they need to circumvent copyright issues?
Self-contained rewrite: Why did Captain Beefheart need to circumvent copyright issues for Mirror Man's production?