An American musician caused a craze for this instrument in the UK after a performance in the London-based revue Streamline. Playing one of these instruments tuned a perfect fourth up from a song’s key signature is called this instrument’s “second position.” John Hammond invited Sonny Terry to play this instrument at the “From Spirituals to Swing” concerts. Mike Bloomfield and Elvin Bishop began their careers in a “blues band” named for a musician who played these instruments using Richter tuning, Paul Butterfield. Howard Levy (-5[1])of the Flecktones developed the (*) overbending technique (-5[1])for this instrument, (-5[1])which was also championed in jazz by Toots Thielemans. Magnus and Hohner are manufacturers of these instruments, which use tuned (-5[1])reeds made from plastic or metal. (10[1]-5[1])For 10 points, Little Walter and Slim Harpo (10[1])played what rectangular (10[2])reed instrument that often imitates trains in country music? (0[1])■END■ (10[4])