runonguiness to CXL: " Le Festival d'Auvers sur Oise, France was abandoned because of rain. The Dead played a free show at Chateau d'Herouville on the 21st instead"

expost: Chabiron 1971;

expost: Samwell 1971;

ref: McNally 2002, 400, via runonguinness to CXL;

expost: McGee 2013, pp. 243-260.

expost: Trench 1971, via deadsources