 During that time, Hartford and Kirk primarily investigated the life of Ed Haley, one of the most significant musicians of his era, whose father had been murdered in the Lincoln County Feud.In 1997, Rounder Records released a four CD set of Haley's home recordings from the late 1940s, titled "Forked Deer" and "Grey Eagle", which featured liner notes by Hartford and Kirk regarding the feud.In 1998, Hartford released the Haley-inspired and Grammy-nominated CD "The Speed of the Old Long Bow", which included some feud-era musical selections.