Eighty-seven holograph letters and imperfect letters of the Ramsay family comprising (a) three letters from E. Ramsay, Glasgow, to her son Will[ia]m Ramsay at Dundee, Liverpool, etc., 1840-1841 and undated (personal, news of members of the family and of friends); (b) fifty-five letters from And[re]w C. Ramsay to his brother William ('Willie') Ramsay, 1841-1881 and undated (the writer's professional activities, brother John's letters, the possibility of an engineering appointment for the recipient, the construction of the North and South Wales Railway, the recipient's engagement, the writer's visit to Canada and the United States of America, the death of the writer's and the recipient's mother, the wedding of the writer's and the recipient's sister Eliza, the educational career of the recipient's son William and of the writer's son Allan, the writer's visit to Ireland, the Countess of Derby's reception at the Foreign Office to meet the Emperor of Russia, a musical party at Carreg Lwyd, the writer's survey of Dyffws, proposed new editions of the writer's The Geology of North Wales and The Physical Geology and Geography of Great Britain, 'the awful tragedy' at Dolau Cothy, the writer's knighthood, etc.); (c) six letters to Eliza Ramsay from her brother And[re]w C. Ramsay from Bromsgrove and South Kensington, 1852-1880 (the writer's marriage, the writer's professional activities, the visit of the writer's family to Hyeres), the recipient's brother J. C. Ramsay, Thomas Works, Demerara, 1858 (the death of the writer's and the recipient's mother and the recipient's arrangements for the future, the writer's health and prospects), and the recipient's sister-in-law M. Louisa Ramsay, Llanfairynghornwy, etc., 1871?-1880 (personal, the illness of the writer's father, the offer to the writer's husband of the Directorship of the Geological Survey of Great Britain and Ireland); and (d) twenty-three letters from M. Louisa Williams from [London], Beaumaris, Hyeres, Nimes, St. Moritz, Cadenabbia, and Llanfairynghornwy, largely to her sister-in-law Catherine [Ramsay] (wife of William Ramsay), [1869-1883] and undated (the wedding of Eliza Ramsay, the writer's interest in the 'Clergy orphan business', Allan's education, a legacy to the writer in Holyhead, the writer's purchase of a house, the writer's stay on the Continent, Andrew, C. Ramsay and the Directorship of the [Government] School of Mines, personal, news of friends). A number of Andrew C. Ramsay's letters to his brother, comprised in group ( b), are written from St. Davids, Aberaeron, Aberystwyth, Machynlleth, Capel Curig, Llanfairynghornwy, Portmadoc, and Beaumaris.