Dillard & Johnson is not a well-documented band or artist in the annals of music history. It's possible that there may be confusion regarding the name. There are, however, noted artists with similar names such as "Doug Dillard" a bluegrass banjo player, and "Robert Johnson," a renowned blues musician. Should you be referring to either of these artists or a different, less known "Dillard & Johnson," please provide more accurate details for a comprehensive description.