This is Wheeler's set of maps from 1877 in their original hardbound case. Rarely offered together in their original cover. Together, the maps cover parts of California, Nevada, Utah, Colorado and New Mexico. The first map is the Progress sheet, which is numbered "0" and is not included in the contents list, but was obviously issued with the set. The other maps are numbered 1 though 9 to match the map list on the inside front cover. The fifth map in the list, "Atlas Sheet 65" that covered eastern California and Death Valley, is missing from this collection. Most of the maps are attractively colored in green and ochre. Sizes vary slightly, but generally are as given. Hard covers in paper with leather spine and gilt stamped title.

1) 1877. Progress Map of the U.S. Geographical Surveys West of the 100th Meridian. A remarkable and attractive map that reflects the survey efforts in the West. It is a detailed representation of the various routes of western expeditions and the important surveys of King (40th parallel), Wheeler, Powell & Hayden. This edition includes the survey seasons of 1869, and 1871 through 1877. Among the details are the locations of occupied and abandoned posts, astronomical stations, signal service stations, telegraphic lines, and the routes of cattle droves and trains. It is a virtual tour de force of prior explorations and surveys with more information than we've seen on any other map.
2) Part of Central Colorado. Atlas Sheet No. 53 (C). With Denver in the upper left, the map covers mostly the drainage basin of the South Platte River.
3) Economic Features of Central Colorado, Atlas Sheet No. 61 (B). Details the drainage basins of the Rio Grande, Arkansas, Gunnison and South Platte Rivers.
4) Economic Features of S.W. Colorado, San Juan Mining Region. Atlas Sheet No. 61 (C) This map details the drainage basins of the Gunnison, Animas, Miguel and Uncompahgre Rivers, and also the Rio Grande.
5) Part of South Western Colorado. Atlas Sheet No. 61 (D). Details the region with topographical information on the drainage basin of the Rio Grande. Locates Saguache and Del Norte.
6) Economic Features of Parts of Southern Colorado and North'n New Mexico, Atlas Sheet No. 69 (B). This map covers the region lying principally in the drainage basins of the Rio Grande, Conejos, Chama and Navajo.
7) Economic Features of Parts of Southern Colorado and Northern New Mexico, Atlas Sheet No. 70 (A). Shows the drainage basins of the Purgatory and Canadian Rivers, and Costilla and Culebra Creeks.
8) Economic Features of Part of North Central New Mexico, Atlas Sheet No. 70 (C). The map locates Cebolla, Fort Union, Los Alamos, the Pueblo village of San Felipe, and more.
9) Economic Features Part of North Central New Mexico, Atlas Sheet No. 77 (B) This colorful map continues the basins of the Rio Grande. Names Albuquerque, Bernalillo, Galisteo, Pena Blanco, and more.

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Condition: A

All maps on sound paper with full margins, folding as issued. Fine color and impression on all. With occasional soiling or offsetting, mostly in blank margins, else very good or fine. Covers generally very good with a little scattered foxing on paper.