Subject
- Plague[remove]15
- Communication3
- Cholera2
- Agriculture1
- Arms sales1
- Concessions1
- Couriers1
- Diplomacy1
- Finance1
- International relations1
- Merchants1
- Meteorological data1
- Napoleonic Wars (1800-1815)1
- Political affairs1
- Political intelligence1
- Public health1
- Railway construction1
- Tobacco1
- Trade (practice)1
- Travel restrictions1