Memorandum of Agreemen (Cockburn and Sidgwick & Jackson)t, 3 Dec. 1971, for "The Devil's Decade", 4pp., fol., signed by Cockburn. Memorandum of Agreement (Penguin), "Bestseller", photocopy, 6pp., unsigned. Memorandum of Agreement (Sidgwick & Jackson and Penguin), "Bestseller", 5pp., not signed by Cockburn. Ibid (Cockburn and Sidgwick & Jackson),"Bestseller" 6 Aug. 1971, 4pp., fol., corrected, initialled extensively and signed by Cockburn. Ibid.,(Sidgwick and Cockburn)) "News and Newspapers", 3 Aug. 1972, 4pp., fol., initialled extensively and signed by Cockburn.