Subject
- Reports26
- Colonial administration19
- Foreign policy19
- International relations15
- Railways14
- Military intelligence13
- Trade routes9
- Colonial policy8
- Telegraph lines8
- Geography7
- Military operations7
- Archaeology6
- Forts6
- History6
- Trade (practice)6
- Treaty of Sèvres (1920)6
- Boer War (1899-1902)5
- Frontiers5
- Propaganda5
- Historical research4