Excursions et Séjours dans les Glaciers et les Hautes Régions des Alpes, de M. Agassiz et de ses compagnons de voyage. Desor, E. Alps,Geology,Mountaineering

First edition. 12mo. pp. xv, 638, [1, errata]; port. frontis. of Agassiz, 6 plates comprising 2 views, a map, a portrait, and 2 plates of specimens; small paper flaw to one leaf (not affecting text), else fine in contemporary full calf by Seton of Edinburgh for the Northern Lighthouse Trust with their emblem in gilt to spine. Edouard Desor (1811-1882) studied law but after a move from Germany to Paris became interested in geology. In 1837 he met Louis Agassiz at Neuchâtel, and thereafter joined him on visits to the Alps to study glaciers and other phenomena. Together they made an ascent of the Jungfrau in 1841 (with James Forbes), and the next year he made the first ascent of the Lauteraarhorn, as described in the present work.