Conversation so far:
How did Paul Butterfield start playing music ?
Exposed to music at an early age, he studied classical flute with Walfrid Kujala, of the Chicago Symphony Orchestra.
Did Paul Butterfield and Nick Gravenites form a band together ?
The pair were soon performing as Nick and Paul in college-area coffee houses.
What did Paul Butterfield do before meeting Nick Gravenites ?
Butterfield was offered a track scholarship to Brown University, however, a knee injury and a growing interest in blues music sent him in a different direction.
Are there any other interesting aspects about this article on Paul Butterfield besides his start playing music, band formation and activities before meeting Nick Gravenites?
Elvin Bishop recalled that in about six months Butterfield became proficient in harmonica as just a natural genius.

Question: Who made this statement ?
Self-contained rewrite: Who made the statement declaring Paul Butterfield a natural genius?