Dated by the reference to material cited in the fourth volume of Carlyle 1858–65, published in February 1864 (see n. 2, below).

CD’s brother, Erasmus, was a close friend of Thomas Carlyle (see Collected letters of the Carlyles and Fielding 1978). In June 1862, Carlyle was attempting to complete volume 4 of his life of Frederick II of Prussia (Carlyle 1858–65; see Dyer 1928, pp. 12–13, and Wilson 1929, pp. 464, 470). In his account of Frederick’s military campaign in Saxony at the commencement of the Seven Years’ War, Carlyle quoted a description of the picturesque highlands of Saxony (known as ‘Saxon Switzerland’) from Wilhelm Lebrecht Götzinger’s Schandau und seine Umgebungen, oder Beschreibung der Sächsischen Schweiz (Götzinger 1812; Carlyle 1858–65, 4: 595–6). This book meets the physical description given by Carlyle, being in octavo format and containing a coloured geological map with the title ‘Topo- und petrographische Reisekarte durch die Sæchsische Schweiz und umliegende Gegend’. However, it was not in the library of the Museum of Practical Geology, Jermyn Street, London, when the first printed catalogue was made in 1878 (White and Newton 1878). Carlyle later reported to Erasmus that the book he was seeking was not in the library of that museum, and that, therefore, he must on a previous occasion have borrowed it from the Geological Society of London (see letter from E. A. Darwin, 1 July [1862]); the Geological Society possessed Götzinger 1812 (Dallas 1881).

Trenham Reeks was the curator and librarian at the Museum of Practical Geology.