Subject
West (U.S.) Description and travel
340
Frontier and pioneer life
293
West (U.S.) History
232
West (U.S.)
124
Overland journeys to the Pacific
96
Indians of North America
73
West (U.S.) Discovery and exploration
48
Cowboys
38
United States Discovery and exploration
35
West (U.S.) Social life and customs
34
Fur trade
33
Crime
32
Pioneers
28
Indians of North America Wars
27
Cattle trade
25
Rocky Mountains
25
Military life
24
Outlaws
24
California Description and travel
21
Explorers
19
Hunting
18
Ranch life
18
Trails
17
Oregon National Historic Trail
15
Postal service
14
West (U.S.) Civilization
14
Gold mines and mining
12
Latter Day Saints
12
Travel
12
Women pioneers
12
Historic sites
11
Santa Fe National Historic Trail
11
West (U.S.) Historiography
11
Women
11
California Gold discoveries
10
History
10
Mines and mineral resources
10
Missouri River
9
West (U.S.) Distances, etc
9
Colorado History
8
Columbia River
8
Cowboys History
8
Mexico Description and travel
8
Natural history
8
United States Description and travel
8
United States Territorial expansion
8
Fur trade History
7
New Mexico Description and travel
7
Northwestern States Description and travel
7
Pacific States
7
more ...