I think that "My Babe" in versions recorded by both Little Walter and Bo Diddley on Chess Records was a direct re-write by willie Dixon of the recording of "This Train" by Sister Rosetta Tharpe. The Tharpe record came out about ten years before the Little Walter which was recorded in Jan '55. Both songs contain the line "...'fore day creepers and midnight ramblers." The song would be much older than that I'm sure. Dixon plays double bass on the Walter record. Maybe Dixon was inspired to emulate Ray Charles by Rays secular re-working of a gospel number into "I got a Woman". Interestingly, one of the 2 guitar players on Walters "My Babe" record is Robert Junior Lockwood, one time travelling companion and contemporary or Robert Johnson.