"A self-taught cornetist, he began playing the horn at the age of 14. Due to his lack of formal music education, he played numerous alternate fingerings, and even played the horn left-handed for eight years. But he was a natural, and by the age of 16 he was playing in local bands such as Wilbur Hatchs Quartet at Delavan Lake and Floyd Beans Band at Linwood Inn."
The Downbeat article gives 14, the Encyclopedia 13, but otherwise the information is very similar.
In my posting mentioned above, I quoted Evans and Evans, "July 5, 1922. Bix joined the Vic Moore-Bud Hatch Quartet at Delavan Lake Country Club." So Bud Hatch became Wilbur Hatch in the Downbeat article, and this was copied by Feather and Gitler in their Encyclopedia. I referred to this in the past as "propagation of errors" by writers who do not check primary sources.