Subject
Frontier and pioneer life
44
Indians of North America
40
West (U.S.) Description and travel
39
United States Discovery and exploration
38
California Gold discoveries
29
California Description and travel
28
Overland journeys to the Pacific
23
Missions
20
Indians of North America Wars
17
Texas History
17
California History
16
Gold mines and mining
16
Texas Description and travel
16
United States Description and travel
15
Mines and mineral resources
14
Alaska Description and travel
13
Pacific railroads Early projects
13
Indians of North America Missions
12
Northwest, Canadian Description and travel
12
Oregon Description and travel
12
United States History
12
Latter Day Saints
11
Texas
10
California
9
Black Hills (S.D. and Wyo.)
8
Geology
8
Klondike River Valley (Yukon) Gold discoveries
8
Mexican War, 1846-1848
8
Natural history
8
New Mexico History
8
Northwest Coast of North America
8
Pacific Coast Indians, Wars with, 1847-1865
8
Voyages to the Pacific coast
8
Indians of North America Government relations
7
Manitoba Description and travel
7
Military life
7
Northwestern States Description and travel
7
Oregon Territory History
7
Silver mines and mining
7
United States Foreign relations
7
Washington (State) Description and travel
7
Yellowstone National Park
7
Canada Description and travel
6
Colorado River (Colo.-Mexico)
6
Kansas Description and travel
6
Kansas History
6
Louisiana History
6
Mexican War, 1846-1848 Campaigns
6
Mexico Description and travel
6
Montana Description and travel
6
more ...