He is best known for his work with the Alex Welsh band, which saw him playing with musicians such as Red Allen, Earl Hines, and Ruby Braff.
[1] Douglas wrote and self-published a semi-autobiographical book, Tunes, Tours and Travel-itis - Eighteen years of Facts, Faces and Fun with the Alex Welsh Band.
[2] in which he cites several humorous encounters with legends of the business, as well as recounting the band's many strange and bizarre misadventures.
[3] The sequel chronicles his adventures in the Jazz world before and after his time with the Alex Welsh Band.
Other than Kerr and Welsh, he worked with Alan Elsdon, Lennie Hastings, Ed Polcer, and Keith Smith.