- Memorandum and articles of association, 1919-1974;
- Special resolutions, 1908-1964;
- Minutes of the board of directors, 1907-2010;
- Minutes of the annual general meetings, 1963-1978;
- Agenda books, 1934-1962;
- Directors' attendance book, 1974-1980;
- Minutes of informal meetings, 1949-1973;