Records of Guinness, Mahon and Company, mainly comprising correspondence between partners, but there are also memorandum and articles of association, 1956-1966 (Ms 38588); agreements and related papers, 1856-1893 (Ms 38589); board minutes and interim accounts, 1966-8 (Ms 38590); and papers relating to the Guinness family, 1924-69 (Ms 38612).
Henry Samuel Howard Guinness (1888-1975), usually referred to in the papers as "S.G.", was a director of Guinness and Mahon Limited, Dublin, and a senior partner in Guinness, Mahon and Company, London. It appears that he wrote many of the notes on the history of the firm and the Guinness family which can be found in this collection. Some of the bundles and files of papers may also have been compiled by him.
Guinness, Mahon and Co , bankers