Subject
- Telegraph lines13
- Boundaries12
- Political intelligence12
- Second World War (1939-1945)12
- Subsidies12
- Territorial disputes12
- Archaeology11
- Kings and rulers--Succession11
- Piracy11
- Roads11
- War (concept)11
- Compensation10
- Historic cities10
- Surveys10
- Customs administration9
- Military occupation9
- Naval affairs9
- Portrait photography9
- Customs duty8
- Kings and rulers--Deposition8