That Old Black Magicby The Clovers

"Sometime around 1948, neighborhood friend Matthew McQuater was returning home from football practice at Howard University, when he spotted the Clovers practicing on the street. Hearing something wrong with their harmony (his "ear" had been formed by singing in church), he stopped to offer some advice. He was invited to some rehearsals, and soon Billy Shelton was out and Matthew was in." - According to Marv Goldberg's R&B Notes