One hundred and one holograph letters, 1849-1850 and undated, written to A. C. Ramsay. The writers include John Barlow, secretary, Royal Institution (the recipient's communication relating to the geological survey of North Wales, a card of admission to Syon Gardens), Edwd. T. Bennett, Ross (the discovery of plants in Snowdonia), Wm. Bennett, Ross (plants from Symonds rocks near Ross and from Snowdonia), Amelia Browne, Wolverhampton (personal, references to friends), Alfd. H. Browne, Wolverhampton (personal), Charlotte A. M. Cookman (née Johnes), Monart House (the writer's illness, the receipt of fossils from the Palaeontographic Society), Wilbraham Falconer, Bath (personal, the recipient's health), Wm. Ferguson, Glasgow (a proposed natural history survey of Clydesdale), Emily M. Forbes (an account of Mr. Jukes's wedding, personal), William Hope, Liverpool (an invitation), Henry M. Ingram, Tyn-y-Celyn, Dolgelly (the writer's 'botanizing excursion'), Jas. F. Ireby? [from London] (the writer's paintings), Trevor E. James, Woodbank, near Caerleon (personal), John Johnes, Dolaucothi (the writer's visit to Ireland, the illness of Charlotte [Cookman], news of neighbours and friends, comments on the recipient's survey, the progress of the school at Llandovery), Augusta Jukes, from Aber, [Wolverhampton], and Merchlyn (personal, references to the geological survey of her husband [Joseph] Beete [Jukes] in North Wales), Henry Kingsmill, junior, Lincolns Inn (an examination at Grays Inn, personal), Agnes Loudon, Bayswater (an invitation), W. Macdonald (an application for an appointment 'at the Geological' [Museum]), Wm. Mathews, Edgbaston (a memorial on behalf of ironmasters), M. E. Playfair (personal), E. Ramsay, his mother, Glasgow, etc. (personal, news of friends and relatives, the recipient's studies), Eliza Ramsay, his sister, from [Glasgow], etc. (the Queen's visit to Scotland, John's appointment with the Royal Insurance Office, personal), J. C. Ramsay, Trinidad (the writer's business affairs, with references to sugar making, personal), Willm. Ramsay, Glasgow, etc. (the writer's business, family news), W. B. Rogers, London (geological studies), F. M. Selwyn, Temple (concerning an invitation, personal), J. Sharpe, Glasgow ( personal), Anna Maria Williams, Llandovery (Charlotte Cookman's health, news of Steuart, of the Johnes family, and of others, the progress of the school building), Wm. Williams, Llandovery (family news), W. R. Steuart Williams, Montgomery and Welshpool (the writer's curacies at Llandyssill in Montgomeryshire and at Welshpool, news from Carmarthenshire, a reference to the death of 'Gwallter Mechain'), and George Wilson, Edinburgh (introducing Professor Munch from Norway). Some of the letters are addressed to Capel Curig and to the Geological Museum, London.