I post this on behalf of inamorata.
In his own words:
Sam Rivers Tuba Trio/James Newton - Flutes!(Circle Records, 1976/1977)
This serves both as an alternative transfer of the final section of the Sam Rivers Tuba Trio at the Bimhuis in 1976 and as the first installment of The Complete James Newton on Circle Records.
Sam Rivers Tuba Trio/James Newton: Flutes!
Circle Records RK 7677/7
Sam Rivers, flute
Joe Daley, tuba & French horn
Warren Smith, drums & percussion
A1 Essence - Part XI (Rivers/Daley/Smith)
Recorded live September 2, 1976 at Bimhuis, Amsterdam by Rudolf Kreis
James Newton, flute
B1 Woman (Bobby Bradford)
B2 The Dean (James Newton)
B3 Choir (James Newton)
B1 recorded live January 16, 1977 at the Smudge Pot, Claremont, CA by Bruce Bidlack
B2, B3 recorded live May 21, 1977 at Studio A, KPFK Pacifica Radio Los Angeles, Cahuenga Blvd., N. Hollywood, CA
Produced by Rudolf Kreis
A link for Sam Rivers' Essence Pt. XI (courtesy of Nick) was posted by onxidlib in the comments to http://inconstantsol.blogspot.com/2012/02/sam-rivers-tuba-trio-essence-heat-and.html. However, that transfer appears to have gone though radical noise reduction, resulting in some loss of high frequency detail. This is my own transfer, carefully de-rumbled and de-clicked but otherwise unchanged except for the manual removal of some defects (mostly in the James Newton tracks).
For a Circle Records discography, see http://jazzlabels.klacto.net/circle.html
An interesting essay by Mark Weber on the wider historical background of the early James Newton recordings and the Los Angeles scene: http://metropolis.free-jazz.net/mark-weber-the-early-lps-of-the-los-angeles-free-jazz-scene/reviews/7875/