EMMONS, Samuel (1841-1911) and WALCOTT, Charles Doolittle (1850-1927) Map of Alaska Showing Known Gold-Bearing Rocks with Descriptive Text Containing Sketches of the Geography, Geology and Gold Deposits and Routes to the Gold Fields. Washington D.C.: United States Geological Society, 1898.8vo (228 x 140mm). Chromolithographic folding map. (Marginal spotting, but generally clean and bright.) Contemporary brown morocco, gilt-lettered, marbled edges (head of spine partially defective, upper joint rubbed). FIRST EDITION. This work describes known routes to the Klondike, geological details such as the distribution of gold bearing formations, characteristics of primary vein deposits, placer deposits and sources of coal.