Found this programme on Facebook, it seems to be public. The caption with it reads: "The 1971 Lincoln Folk Festival at Tupholme Manor Park is fairly legendary - the running order from the programme should give some idea why. The Byrds were billed for an acoustic set which they did at sunset. The sun had just gone down when they came back electric for their encore and did an incredible extended Eight Miles High while campfires lit up all over the site…My enduring memories other than the great music and awful toilets are of mercifully being able to escape to the back stage area - where Tim Hardin was being dissuaded from trying to fly out of an upstairs window of the manor house, and of Tom Paxton making a grand entry in a white limo, with manager Joe Lustig, and a fur coated, mini-skirted "model" on either arm - to universal disinterest. "