Here is a selection of 1967 Rolling Stones sessions at Olympic Sound Studios. I've noted what Brian plays in each session recording, but fuller details are in the descriptions of each Youtube upload. We Love You session - featuring Brian Jones playing mellotron: youtu.be/fbImeqyhuts She's A Rainbow session - featuring Brian Jones playing mellotron: youtu.be/I6dMmZhoYWw The Lantern session - featuring Brian Jones playing acoustic guitar then organ: youtu.be/d9I3VMicePI Gomper session - featuring Brian Jones playing electric dulcimer: youtu.be/yf-PCbAhGTk 2000 Light Years From Home session - featuring Brian Jones playing mellotron: youtu.be/u-qoH9zQxvs On With The Show session - featuring Brian Jones playing mellotron: youtu.be/uvR9sgL3Gxg Majesties Honky Tonk - featuring Brian Jones playing organ: youtu.be/u0rYzTpMDkg Gold Fingernails session - featuring Brian Jones playing harmonica: youtu.be/A81uEQW5I4w She's Doing Her Thing session - featuring Brian Jones playing congas: youtu.be/Hh1_kF2cOk4 ... Similar session recordings for Citadel, 2000 Man and a track titled on bootlegs as Soul Blues are available, but Brian is not playing on those. Brian did overdub soprano saxophone, recorder and mellotron on to Citadel though. It seems he did not overdub on to 2000 Man, which if true, would mean that is the only track on Their Satanic Majesties Request to not feature Brian. There are also session takes of Sing This Altogether and a few other things, but there are details about those which require further consideration and clarification.