Includes correspondence with: Tim Sainsbury MP; Lord (Duncan) Duncan-Sandys; Nicholas Scott MP (with his letter of congratulation to MT on her becoming Party Leader, circa February 1975); Baroness ("Pam") Sharples; Giles Shaw MP; Michael Shaw MP (with his letter of congratulation to MT on her becoming Party Leader, February 1975); William ("Bill") Shelton MP (includes Shelton’s notes on meetings of the [Conservative Parliamentary] Finance Committee, 21 October, 4 and 11 November 1975, the Foreign and Commonwealth Committee, 4 November 1975, and a meeting of Greater London members, 9 December 1975); Colin Shepherd MP; Michael Shersby MP (with his letter of congratulation to MT on her becoming Party Leader, February 1975); Lord (Emanuel) Shinwell (consists of a copy of a letter by MT to Shinwell on his birthday, October 1977); William Philip Sidney (1st Viscount de L'Isle); Frederick ("Fred") Silvester MP (consists of his letter of congratulation to MT on her becoming Party Leader, February 1975); Roger Sims MP; Sir George Sinclair MP; and Trevor Skeet MP (with his letter of congratulation to MT on her becoming Party Leader, February 1975)