Bullock was most active in the 1930s. He recorded some 500 tunes over the course of his career. Bullock belonged to select group of mostly freelance vocalists who sang on hundreds of New York sessions, which included Smith Ballew, Scrappy Lambert, Elmer Feldkamp, Irving Kaufman, Arthur Fields and Dick Robertson. Some of these vocalists were also musicians, but their singing was more often featured. Bullock began his career in vaudeville and singing in movie palaces for silent films. His career as a studio musician took off in the late 20s, and in the 30s he sang with musicians such as Duke Ellington, Luis Russell, Cab Calloway, Bunny Berigan, Bill Coleman, Jack Teagarden, the Dorsey Bros, Joe Venuti, and Eddie Lang. Bullock's recordings proved so popular that he used pseudonyms for some recordings, including the name Sleepy Hall. As for composer "Irving King", it was a pseudonym for the British songwriting team of James Campbell and Reginald Connelly. This recording was made in 1933.
