Prod. 2221 - Donald's Cousin Gus
--albeit a bit confusingly--the interesting, hard-to-find book "One of Walt's Boys").
Layout by Bill Herwig, animation by Woolie Reitherman, Paul Allen, Don Towsley, Lee Moorehouse, Johhny Cannon, Bernie Wolf with single scenes by James/Shamus Culhane and Ken Peterson (before HE went into management) - and an effects scene by Reuben Timmins. Released 5/19/39 and available on Treasures DVD - The Chronological Donald, Volume One.
According to Jack Kinney (in a letter to my old mentor Børge Ring), they intended to make a series using Cousin Gus, but decided against it as "gluttony wasn't funny..."