[ALPES]. HELBRONNER (Paul). Detailed geometrical description of the French Alps. Paris, Gauthier-Villars, 1910-1939. 12 volumes in 11 large folio volumes, complete first edition of all text volumes of this exceptional work, illustrated with numerous maps, plates, facsimiles and fold-out panoramas in black, bound at the end of each volume and based on the author's own surveys and photographs. Publisher's full burgundy percaline. Enriched with an autograph "hommage de l'auteur" to the first volume, followed by a signed autograph letter to General Fatou in volumes 2 to 11, Paul Helbronner having died the year before publication of the last volume. "This sum is very rarely complete" (Perret 2213). The result of 22 survey campaigns, this monumental publication presents the geodetic modeling of the entire French Alps, Mont Blanc and Corsica. (some differences in color and scratches on the percalines, brittle jaws on volumes 1 and 8). Expert: Mr. Nicolas Asvisio