Illinois, US
- State/Province Name
- Illinois
- Country Name
- United States
- Letter from Marcia Armstrong Seward to Frances Miller Seward, September 17, 1833
- Letter from Louisa Cornelia Seward Canfield to William Henry Seward, September 12, 1836
- Letter from Samuel Sweezey Seward to William Henry Seward, January 8, 1837
- Letter from Louisa Cornelia Seward Canfield to Mary Jennings Seward, March 14, 1838
- Letter from Louisa Cornelia Seward Canfield to William Henry Seward, June 28, 1838
- Letter from Julia Ann Van Brunt to William Henry Seward, July 11, 1838
- Letter from Mahlon Dickerson Canfield to William Henry Seward, September 10, 1838
- Letter from Benjamin Jennings Seward to Frances Miller Seward, March 21, 1840
- Letter from Augustus Seward to William Henry Seward, September 24, 1841
- Letter from Samuel Sweezey Seward to William Henry Seward, November 22, 1841
- Letter from Anna Sheridan Smith to Frances Miller Seward, November 30, 1846
- Letter from William Henry Seward, Jr. to William Henry Seward, September 21, 1870
- Letter from Benjamin Jennings Seward to William Henry Seward, December 23, 1826
- Letter from Benjamin Jennings Seward to William Henry Seward, February 8, 1828
- Letter from Benjamin Jennings Seward to William Henry Seward, June 26, 1828
- Letter from Frances Miller Seward to William Henry Seward, February 1, 1831
- Letter from Frances Miller Seward to William Henry Seward, March 17, 1831
- Letter from Samuel Sweezey Seward to William Henry Seward, June 2, 1831
- Letter from Benjamin Jennings Seward to William Henry Seward, July 28, 1831
- Letter from Frances Miller Seward to Lazette Miller Worden, February 24, 1832
- Letter from Benjamin Jennings Seward to William Henry Seward, February 20, 1833
- Letter from Benjamin Jennings Seward to William Henry Seward, March 9, 1833
- Letter from Benjamin Jennings Seward to William Henry Seward, July 18, 1833
- Letter from Mary Jennings Seward to Samuel Sweezey Seward, August 15, 1833
- Letter from Benjamin Jennings Seward to William Henry Seward, September 13, 1834
- Letter from Louisa Cornelia Seward Canfield to Mary Jennings Seward, November 30, 1836
- Letter from Benjamin Jennings Seward to William Henry Seward, December 1, 1836
- Letter from William Henry Seward to Benjamin Jennings Seward, May 27, 1837
- Letter from Frances Miller Seward to Lazette Miller Worden, June 4, 1837
- Letter from Frances Miller Seward to William Henry Seward, June 16, 1837
- Letter from Frances Miller Seward to William Henry Seward, April 20, 1838
- Letter from Frances Miller Seward to William Henry Seward, August 12, 1838
- Letter from Benjamin Jennings Seward to Frances Miller Seward, February 13, 1839
- Letter from George Washington Seward to William Henry Seward, January 2, 1852
- Letter from Frances Miller Seward to Augustus Henry Seward, November 3, 1857
- Letter from William Henry Seward to Frances Miller Seward, May 12, 1859
- Letter from William Henry Seward to Frances Adeline Seward, June 14, 1859
- Letter from Frances Adeline Seward to William Henry Seward, March 26, 1861
- Letter from Frances Adeline Seward to Lazatte Miller Worden, January 23, 1863
- Journal of Frances Adeline Seward, April 5, 1862 to May 1, 1863