Robert Johnson idolised Lonnie Johnson and sometimes introduced himself to newcomers as "Robert Lonnie, one of the Johnson brothers. His biggest influence was said to be from an unrecorded bluesman named Ike Zinneman. After a year or so learning from Zinneman, Johnson had acquired an encyclopedic knowledge of his instrument, an ability to sing and play in a multiplicity of styles, and a very carefully worked-out approach to song construction, keeping his original lyrics with him in a personal digest. No recording of Zinneman's work is available, so he may be your man!