This dude is in the process of uploading over 3,600 of his 78 recordings for your enjoyment. He's currently linked up over 2,400 titles and has included a searchable ACCESS database.
Bunk Johnson, The Utica Institute Jubilee Singers, The Castlewood Marimba Band.
Jimmy Rogers, Dizzy Gillespie or Artie Shaw
Gayla Peevey doing "I Want A Hippopotamus For Christmas" or Oscar Qualm doing duck calls
It's all here and much, much more. A goldmine.
Found at the always entertaining Bifurcated Rivets