I was going to say YouTube Saturday. But YouTube has only got a couple. Whereas you can download 10 free Leroy Carr mp3’s here. Says they are in the public domain. I recommend: all of them. But you might start with “How Long How Long Blues”, “When the Sun Goes Down” and “How Long Has That Evening Train Been Gone”, later covered by the Supremes. Speaking of which: you can hear an unreleased demo of the Supreme’s version here.
I don’t know much about Leroy Carr. I heard him for the first time a few days ago, bought a bunch