Subjects
- Coal mining.[remove]35
- Politics and government.15
- Railroads15
- Account books11
- Lumber trade9
- Coal mining - coal companies.7
- Lawyers - letters and papers.7
- Farms and farming.6
- Genealogy6
- Petroleum industry and trade6
- Agriculture 5
- Elections5
- Iron furnaces and iron industry.5
- Rivers and river valleys.5
- Travel accounts.5