Map of Montana Trading Posts 22" x 36" by Robert Taylor. Verso: "This map locates historical trading posts from Fort Manual Lisa [Fort Ramon] on the Yellowstone in 1807 to Fort McLeod on the Boulder River in 1896. All posts are related to the lakes, creeks, rivers and passes which dictate their location. Western calligraphy by Cecilia R. Vaniman." $1,000-1,500 Provenance: Private Collection, Bozeman, MT. Excellent condition.