Incredible String Band #4
Active: February 1971 - October 1972
- Robin Williamson - vocals, guitar, oud, fiddle, whistle, percussion, cello, oboe, mandolin, kazoo, electric guitar, bass recorder, banjo, flute, bass, hardanger fiddle, electric piano, viola, gimbri and Chinese flute
- Mike Heron - vocals, guitar, organ, sitar, piano, harmonium, bass, flute and accordian
- Malcolm LeMaistre - vocals, harpischord, bass, percussion, kazoo, swanee whistle, mandolin, whistle, tenor recorder, bazouki, glockenspiel, harmonica, clarinet, church organ, guitar and harmonium
- Licorice McKechnie - vocals, harmonium, organ, percussion, bass, kazoo, bironne and autoharp
- 'Liquid Acrobat As Regards The Air' LP (Island, October 1971)
- 'Earthspan' LP Island, October 1972)
- Gerry Conway - drums on 'Liquid Acrobat As Regards The Air'
- Brian Davidson - drums on 'Earthspan'
- Digger and friends - backing vocals on 'Earthspan'
- Stuart Gordan - vocals, viola and violin on 'Earthspan'
- Jack Ingram - hand claps on 'Earthspan'
- Dave Mattacks - drums on 'Earthspan'
- Stan Schnier- pedal steel guitar and bass on 'Liquid Acrobat As Regards The Air', bass, high hat and hand claps on 'Earthspan'