Bluegrass is not old. It's a recent development. Monroe started off in the oil fields of Indiana with his Bluegrass Boys. The Stanleys were popular around Virginia in the 1950's when I first heard them either on WWVA in Wheeling West Virginia or The Old Cotillion Barn Dance which I believe is in Virginia. Don Reno was a contemporary of Scruggs but never acheived the popularity because he went into the army. The earliest form of what we call Bluegrass dates back to the late 40's.

Frank