Virginians Ralph and Carter Stanley, the Stanley Brothers, took the traditional Appalachian string band songs of their home and updated them into a traditionally rooted modern bluegrass sound that was singular for its authentic tone, no-frills simplicity, and at times haunting and astonishing beauty, the very model of the high lonesome sound. This expansive four-disc, 111-track box covers the later part of the middle period of their recording career, collecting virtually every side the brothers recorded for the King record label between 1961 and 1965. That's a whole lot of Stanley Brothers, but the musical quality, integrity, and execution of this storied duo never waver here, and indeed, they never really did waver one bit any time the two of them stepped in front of the microphones.