Jethro Tull: 1971 - 1975
Albums: Aqualung (1971), Thick As A Brick (1972), A Passion Play (1973),Warchild (1974),
Minstrel In The Gallery (1975)
Instruments: bass guitar

In old Blackpool Times Jeffrey Hammond joined the bands "The Blades" and "The John Evan Band" where he come together with Ian Anderson. Ian Anderson dedicated him a song called "Jeffrey Goes To Leicester Square" form the album Stand Up. Joining Tull Jeffrey added a second Hammond to his name. After quitting Jethro Tull to work on his career as a painter (which he still was before getting a Tull Member), Jeffrey burned all his outrageous stage clothing.