With as many family bands and brother duets as there are in bluegrass and old-time music -- not to mention as many people as there are named Franklin in the mountainous area connecting North Carolina, Tennessee, Virginia, and Kentucky -- the bluegrass private detectives found that obtaining information about the Franklin Brothers band was something like the proverbial record needle in a haystack. Eventually, Delmas Franklin was located, perhaps actually in a haystack. He had performed one of the lead vocals on a rare recording that was a sort of Rosetta stone of early bluegras...