Hillsboro, IL
- Alternate Place Spelling
- Hillsborough
- City/Town/Village Name
- Hillsboro
- County/Parish
- Montgomery
- State/Province Name
- Illinois
- Country Name
- United States
- Letter from Frances Miller Seward to William Henry Seward, April 03, 1831
- Letter from Benjamin Jennings Seward to William Henry Seward, January 24, 1832
- Letter from Benjamin Jennings Seward to William Henry Seward, February 1, 1832
- Letter from Benjamin Jennings Seward to William Henry Seward, June 28, 1832
- Letter from George Washington Seward to Frances Miller Seward, June 11, 1850
- Letter from George Washington Seward to William Henry Seward, July 25, 1850