Topic
Discovery and exploration
Arctic regions
152
Scientific Expeditions
112
Natural history
76
Description and travel
74
Antarctica
63
British
47
Northwest Passage
44
Sir
42
John
38
American
34
Greenland
29
Canadian
27
Northwest
26
Northwest Territories
26
1786-1847
23
Franklin
23
(1913-1917)
22
Crocker Land Expedition
22
Field notes
22
Oceania
22
Travel
17
Botany
16
Geology
16
Voyages around the world
16
Geophysics
15
canimp
15
America
14
South America
14
(1838-1842)
13
Canada
13
Hawaii
13
United States Exploring Expedition
13
Inuit
12
Meteorology
12
To 1900
12
1874-1970
11
Donald Baxter
11
MacMillan
11
Northwest Coast of North America
11
Oregon
11
South Pole
11
German
10
Northeast Passage
10
Birds
9
Eskimos
9
1741-1779
8
Charles
8
Clerke
8
Gore
8
more ...