Reviving this thread just to check a point in the DigiTrad:

Based on the discussion above it looks like what is in the DigiTrad as Cocaine Blues and Cocaine Blues 3 are (or at least are based on or related to) the Gary Davis version, although Cocaine Blues 3 is attributed to Luke Jordan at the top and bottom. What is in DigiTrad as Cocaine Blues (4) appears to be the real Luke Jordan version including the "furniture man", and is attributed to him at the bottom.   What is listed as Cocaine Blues 2 is pretty clearly the Little Sadie variant version (Red Arnall?).   Since, unless I am misreading the comments, it appears that the Cocaine 3 is NOT the Luke Jordan version - is there a way to delete the attribution to him on that listing in Digitrad?