An original telegram from Grateful Dead managers Danny Rifkin and Rock Scully to San Francisco Chronicle music columnist and Rolling Stone Magazine co-founder Ralph J. Gleason. Rifkin and Scully write to let Gleason (an organizer of the Monterey Pop Festival) know that the Dead have returned from Monterey Pop with amplifiers belonging to The Mamas and the Papas, and that various San Francisco bands are going to use them at the Diggers-organized "Summer Solstice Festival" (which took place a week after Monterey.) Via Gleason, they invite The Mamas and the Papas and their friends to join in the festivities (somewhat disingenuously, as the telegram is dated the day the festival took place, June 21, 1967. Monterey Pop was held the weekend prior.) The Jefferson Airplane, Big Brother and the Holding Company, the Grateful Dead, Quicksilver Messenger Service and Mad River appeared at the "Summer Solstice Festival" and presumably used The Mamas and The Papas equipment. Scully and Rifkin write that if they can't make the show, "we will return it with thanks, to wherever you want to pick it up." Gleason has written "Rifkin" on the front page to indicate that he wanted it filed under that name. This documents a previously unknown chapter in the story of the San Francisco Scene/Monterey Pop Festival. Obtained from the Ralph J. Gleason archive.