Rex Stewart was born on February 22, 1907 in Philadelphia, Pennsylvania and learned to play the cornet. He developed a half-valving technique that created quartertones that Duke Ellington would later showcase along with his muted sound and forceful style.

After stints with Elmer Snowden, Fletcher Henderson, Horace Henderson, the McKinney’s Cotton Pickers and Luis Russell, he joined the Ellington band in 1934, replacing Freddie Jenkins.

Stewart co-wrote "Boy Meets Horn" and "Morning Glory" while with Ellington, and frequently supervised outside recording sessions by members of the Ellington band. After eleven years Stewart left…