Jeffrey Hammond, born July 30, 1946, in Blackpool, England, always credited as Jeffrey Hammond-Hammond as a playful nod to his parents sharing the surname Hammond, was a key figure in Jethro Tull’s early 1970s lineup. A childhood friend of Ian Anderson, he met Anderson, John Evans, and Barriemore Barlow at school in Blackpool, playing together in the beat group The Blades. Post-The Blades, Jeffrey played bass for some time in The John Evan Band. After grammar school, Hammond chose to study painting over music, but Anderson persuaded him to join Jethro Tull as their bassist in January 1971, replacing Glenn Cornick. Despite lacking professional experience, Hammond brought a distinctive presence, notably wearing a black-and-white striped suit with a matching bass guitar during the Thick as a Brick (1972) tour, a trademark he famously burned in December 1975 upon leaving the band.

Hammond played on pivotal Jethro Tull albums, including Aqualung (1971), Thick as a Brick (1972), Living in the Past (1972, compilation), A Passion Play (1973), WarChild (1974), and Minstrel in the Gallery (1975). His bass playing, though requiring significant rehearsal due to the complexity of Tull’s music, complemented their progressive sound. Before joining as a performer, Hammond was a close associate of the band, inspiring Anderson’s songs like “A Song for Jeffrey” (This Was, 1968), “Jeffrey Goes to Leicester Square” (Stand Up, 1969), and “For Michael Collins, Jeffrey and Me” (Benefit, 1970). He also narrated the surreal “The Story of the Hare Who Lost His Spectacles” on A Passion Play (1973), sharing writing credits with Anderson and John Evans, and suggested the name “claghorn” for a hybrid instrument (a saxophone mouthpiece and bell on a flute body) used in “Dharma for One” (This Was).

After leaving Jethro Tull in 1975 to return to his first love, painting, Hammond was replaced by professional bassist John Glascock. According to Ian Anderson’s 2002 sleevenotes for Minstrel in the Gallery, Hammond never played bass again, dedicating himself fully to his art career in Blackpool, Lancashire. He made occasional non-performing appearances with Tull, including their 25th anniversary reunion in 1994, where he joined Anderson and Martin Barre for an interview featured on the 1997 Thick as a Brick reissue. Known for his eccentric personality and artistic spirit, Hammond remains a beloved figure in Tull’s history, with his contributions immortalized in their classic albums and Anderson’s affectionate song tributes.