Second of three oral history interviews with Samuel Jay Keyser, Professor Emeritus in the Department of Linguistics and Philosophy at MIT, jazz trombonist, poet. Interviewed by Forrest Larson, MIT Lewis Music Library. Topics include: technical aspects of trombone playing, the King 3B trombone, trombonists Tommy Dorsey, Carl Fontana, Phil Wilson, Jack Teagarden, Bill Watrous, improvisation and rules, a linguistic perspective on jazz improvisation, bebop, jazz musicians from MIT and the Boston area, Roy Lamson, Warren Rohsenow, Herb Pomeroy, Tom Lindsey,(trumpet), Bill Youngren (piano), Jeff Stout (trumpet), Perry Lipson (guitar), Steve Pratt (bass), George Poor (trumpet), Dave Broderick (bass), Rich Orr (trombone), Mark Harvey (composer, trumpet), Everett Longstreth (band leader, arranger, trumpet).