Topic
Discovery and exploration
Arctic regions
167
Scientific Expeditions
108
Description and travel
79
Natural history
78
Antarctica
66
British
47
Northwest Passage
45
Sir
45
John
41
American
37
Greenland
31
Canadian
27
Northwest
26
Northwest Territories
26
Franklin
25
1786-1847
23
Travel
23
(1913-1917)
22
Crocker Land Expedition
22
Field notes
22
Oceania
22
South America
19
Geophysics
17
Botany
16
Voyages around the world
16
America
15
Canada
15
Geology
15
canimp
15
(1838-1842)
13
Hawaii
13
United States Exploring Expedition
13
Inuit
12
To 1900
12
1874-1970
11
Donald Baxter
11
MacMillan
11
Meteorology
11
Northwest Coast of North America
11
Oregon
11
Eskimos
10
German
10
Maps
10
North America
10
Northeast Passage
10
Voyages and travels
10
Birds
9
Clerke
9
South Pole
9
more ...