Louis Auguste Bisson (1814-1876) & Auguste Rosalie Bisson (1826-1900), known as Bisson Frères Excursion to Haute-Savoie. Mont Blanc and its glaciers. Alpes, 1862. Ascent of Mont Blanc. Crevasse on the Grand Plateau path (departure). Albumen print, mounted on card. Dry stamp lower left. Stamp of the photographers, dry stamp "Ancienne Maison Bisson Frères. Placet Successeur" and handwritten caption in graphite on lower mount. 39.4x23.5 cm Bibliography : Milan Chlumsky - Ute Eskildsen and Bernard Marbot, Les Frères Bisson, photographes. De flèche en cime, 1840-1870, cat. expo, Paris, BnF, 1999, cover (variant).