Conversation so far:
What happened with Sarah Vaughan in 1943?
During her week of performances at the Apollo, Sarah Vaughan was introduced to bandleader and pianist Earl Hines. After a brief tryout, Hines replaced his female singer with Vaughan.
How did Hines replacing his female singer with Sarah Vaughan turn out?
Sarah Vaughan spent the remainder of 1943 and part of 1944 touring the country with the Earl Hines big band.

Question: Did she develop her musicianship?
Self-contained rewrite: Did Sarah Vaughan develop her musicianship?