Subject
- Harbours10
- Maritime transport10
- Political intelligence10
- Territorial disputes10
- Compensation9
- Napoleonic Wars (1800-1815)9
- Nationality9
- Petroleum industry9
- Piracy9
- Political conflicts9
- Railway construction9
- Reports9
- Trade statistics9
- Wireless telegraphy9
- Arms control8
- Consular services8
- Embassies and consulates8
- Merchant shipping8
- Naval operations8
- Negotiation8