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Interesting early map of Colorado, colored by counties.

Shows towns, rivers, lakes, roads, mountains, and other details.

Recently formed counties include:

  • Bent County ,1874
  • San Juan County, 1876
  • Chafee County, 1879
  • Custer County, 1877
  • Gunnison County, 1877
  • Ouray County, 1877
  • Routt County, 1877
O.W. Gray Biography

O. W. Gray was a publishing firm based in Philadelphia. Later, they published as O. W. Gray & Son. They published atlases in the late nineteenth century. Gray's National Atlas was one of the most successful commercial ventures of the 1870s and one of the last to employ hand coloring on maps.