WERTENBAKER PAPERS. Vols. CLVIII-CLXIV. ‘Human Voices’; 1990-1994, n.d. Screenplay by Wertenbaker for Granada Television relaying the story of Ann Wickett Humphry and the Hemlock Society. Seven volumes.
Vol. CLVIII. Correspondence relating to the commissioning and research for the screenplay (ff. 1-23), together with the printed research material; 15 June-14 Oct. 1994, n.d. ff. 206.