HELBRONNER (Paul). Detailed geometrical description of the French Alps. Appendix to Volume X. Tour d'horizon complet du sommet du Pelvoux. Gauthier-Villars & Cie, 1934. 1 vol. broadside. 1 large colour panorama, in publisher's half cloth portfolio. First edition. The panorama, 6 metres long, was photographed in colour from the author's watercolours. It is here in 10 separate 60 cm sheets, as printed. A very spectacular set in good condition. Perret, 2214 Also included: - HELBRONNER (Paul): Tours d'horizon photographiques de sommets extraits du tome premier de la Description géométrique détaillée des Alpes Françaises. Paris, Gauthier-Villars, 1911. Oblong folio, in a publisher's half cloth portfolio/ Illustrated with 18 large fold-out panoramas, seen from the Goléon, the Thabor, the Brequin, the Aiguille de Péclet, the Dent Parrachée, the dent de Burgin, the Grande Casse, the Cheval Noir, de Bellecôte, du Mont Jovet, du sommet de l'Aiguille Rouge, du Contrefort de l'Aiguille Rouge, du Roignais, du Mont Joly, du Brévent, de la Pointe Percée, du Buet et de la Dent d'Oche (repaired tear to the cardboard, fresh interior).