Correspondence, speeches, articles, notes, press cuttings, receipts, income tax returns, electoral returns, an account book, leaflets, a 1900 pocket diary and photographs. The correspondence includes material on political and trade union matters, most of which falls within the period of Watson's term in Federal Parliament from 1901 to 1910. Subjects include the choice of a site for a federal capital, progressive land tax, conscription, and Watson's retirement from the position of leader of the Labour Party in 1907. Correspondents include Sir Edmund Barton, Sir John Langdon Bonython, Alfred Deakin, Henry Bournes Higgins, Sir Isaac Isaacs, Sir George Houston Reid, Thomas Price, William Morris Hughes, George Beeby, J.S. Collings, Sir Joseph Carruthers, William Dyson, Lord Novar, B.R. Wise, J. Ramsay MacDonald, S.M. Mowle, R. Jebb, J.W. Gregory, and J.M. Toomey. Also included are various speeches, articles and notes relating mainly to Watson's political career, press cuttings (mainly relating to Watson's retirement), receipts, income tax returns, electoral returns, an account book, leaflets, a pocket diary for 1900, and photographs.