HELBRONNER (Paul). Detailed geometrical description of the French Alps. Appendix to volume II. A complete overview of the summit of Mont Blanc. Gauthier-Villars & Cie, 1921. 1 vol. in-plano. 6 panoramas in colour including the grand tour d'horizon of the summit of Mont-Blanc, in a half cloth portfolio. First edition. The panoramas have been photographed in colour from the author's watercolours. They include the panorama from the Col du Géant, the summits of the Mont Maudit, the Belvédère des Aiguilles Rouges, the Aiguille du Tour and the Aiguille du Moine, as well as the grand tour d'horizon du sommet du Mont-Blanc, which is 6 metres long. A total of 18 sheets are assembled to make up these 6 panoramas. A very spectacular set in good condition. (Perret 2214).