Conversation so far:
Why did Lester Young leave Basie?
Lester Young is rumored to have refused to play with the Basie band on Friday, December 13 of that year for superstitious reasons spurring his dismissal.
Who did Lester Young work with after Basie?
Lester Young subsequently led a number of small groups that often included his brother, drummer Lee Young, for the next couple of years.

Question: What were some of the songs they recorded?
Self-contained rewrite: What were some of the songs Lester Young recorded with his brother, Lee Young?