Subject
- Paddle steamers--Ohio River.1
- Parades--Pennsylvania--Pittsburgh.1
- Peacocks.1
- Picnics.1
- Pittsburgh (Pa.)--History--20th century.1
- Playgrounds.1
- Postcards1
- Prisons.1
- Railroad accident report.1
- Railroad accidents.1
- Railroad trains.1
- Railroads, Cable.1
- Railroads, Miniature.1
- Ruined buildings--Pennsylvania--Pittsburgh.1
- Shipping.1
- Sibert, William L. (William Luther), 1860-1935.1
- Skiing.1
- Special Supplemental Food Program for Women, Infants, and Children (U.S.)1
- Speeches, addresses, etc.1
- Sports.1