Who woulda thunk Simon & Garfunkel would ever record such a thing! But it sounds wonderful. Apparently it's from a 3-CD boxed set called "Old Friends" Columbia/Legacy CD 65429, 2001.

The Everly Brothers did record it, and I'd bet they were the inspiration for S&G. It was also recorded by Gene Autry, Wilf Carter, Johnny Cash, Ferlin Husky, Patsy Montana, Jim Reeves, Marty Robbins, The Sons of the Pioneers, Doc Watson, and Slim Whitman.

Hank Snow wrote and sang a song called "The Answer to 'That Silver Haired Daddy of Mine.' "