20 Frith Street been presented to the museum of Görlitz by Baron de Gersdorf. (Baron von Gersdorff from Saxony, possibly?). Gersdorf authenticated the first ascent of Mont Blanc by Jacques Balmat and physician Michel-Gabriel Paccard in 1786. Exchaquet was also the director of mines and foundries at Servoz in Haut-Faucigny, where attempts were made to emulate the success of the English steel-makers who, however, were using the very best imported Swedish Oregrounds iron. In 1816 Troye co-authored with one S. Glover "A Description of the Inundation of the Valley of Bagnes in Swisserland". Troye published an account of Mont Blanc and his models
Grünhorn the Bernese mineralogist Edmund von Fellenberg with guides Peter Michel, Peter Egger and Peter Inäbnit. They climbed the mountain from the west side, starting at the "Ewigschneefeld", a tributary glacier of the Aletsch Glacier. They successfully reached the summit despite very bad weather conditions. The same climbers had made an attempt on the peak in the previous year, but they could only reach a lower prominence of the Grünegghorn. The second ascent was made by W. A. B. Coolidge, with guides Christian and Rudolf Almer (sons of Christian Almer). A route on the north-east ridge was opened on 26 August