| Results | |||
| Note: A ? indicates the information presented is a 'best guess'. The information on the original letter is unknown or illegible and may not be completely accurate. | |||
| Letter Number | Letter Date | Written By | Written To |
| 1994 | 1860 January 01 | Hiram Sibley | Isaac Russell Elwood |
| 1995 | 1856 January 07 | Hiram Sibley | Willard H. Smith |
| 1996 | 1863 January 09 | Hiram Sibley | William R. Martin |
| 1997 | 1847 January 14 | Hiram Sibley | Ira Godfrey |
| 1998 | 1863 January 21 | Hiram Sibley | Hobart F. Atkinson |
| 1999 | 1855 January 23 | Hiram Sibley | Edwin C. Litchfield |
| 2000 | 1860 January 24 | Hiram Sibley | Isaac Russell Elwood |
| 2001 | 1860 January 26 | Hiram Sibley | Isaac Russell Elwood |
| 2002 | 1856 January 27 | Hiram Sibley | Isaac Russell Elwood |
| 2003 | 1860 January 29 | Hiram Sibley | Isaac Russell Elwood |
| 2004 | 1860 January 31 | Hiram Sibley | Isaac Russell Elwood |
| 2005 | 1860 January 31 | Hiram Sibley | Isaac Russell Elwood |
| 2006 | 1864 February 01 | Hiram Sibley | Cyrus W. Field |
| 2007 | 1852 February 04 | Hiram Sibley | C. V. Howell |
| 2008 | 1861 February 04 | Hiram Sibley | Isaac Russell Elwood |
| 2009 | 1864 February 04 | Hiram Sibley | Oliver H. Palmer |
| 2010 | 1860 February 08 | Hiram Sibley | Isaac Russell Elwood |
| 2011 | 1860 February 10 | Hiram Sibley | Isaac Russell Elwood |
| 2012 | 1858 February 12 | Hiram Sibley | J. W. Brooks |
| 2013 | 1860 February 14 | Hiram Sibley | Isaac Russell Elwood |
| 2014 | 1864 February 15 | Hiram Sibley | |
| 2015 | 1860 February 16 | Hiram Sibley | Isaac Russell Elwood |
| 2016 | 1858 February 17 | Hiram Sibley | J. B. Jervis |
| 2017 | 1860 February 18 | Hiram Sibley | Isaac Russell Elwood |
| 2018 | 1860 February 21 | Hiram Sibley | Wilson G. Hunt |
| 2019 | 1858 February 23 | Hiram Sibley | William L. Scott |
| 2020 | 1855 February 24 | Hiram Sibley | A. Hubble |
| 2021 | 1864 March 08 | Hiram Sibley | E. R. Tinker |
| 2022 | 1854 March 10 | Hiram Sibley | Edwin C. Litchfield |
| 2023 | 1860 March 11 | Hiram Sibley | Isaac Russell Elwood |
| 2024 | 1860 March 12 | Hiram Sibley | Isaac Russell Elwood |
| 2025 | 1849 March 13 | Hiram Sibley | Oliver W. Whitney |
| 2026 | 1857 March 16 | Hiram Sibley | Jeptha Homer Wade |
| 2027 | 1863 March 16 | Hiram Sibley | Perry McDonough Collins |
| 2028 | 1852 March 17 | Hiram Sibley | Cambridge Livingston |
| 2029 | 1860 March 20 | Hiram Sibley | Isaac Russell Elwood |
| 2030 | 1863 March 21 | Hiram Sibley | Perry McDonough Collins |
| 2031 | 1853 March 24 | Hiram Sibley | Isaac Russell Elwood |
| 2032 | 1863 March 25 | Hiram Sibley | A. B. Smith |
| 2033 | 1860 April 04 | Hiram Sibley | Isaac Russell Russell Elwood |
| 2034 | 1862 April 04 | Hiram Sibley | Rosewell S. Burrows |
| 2035 | 1863 April 06 | Hiram Sibley | Anson Stager |
| 2036 | 1860 April 08 | Hiram Sibley | Isaac Russell Russell Elwood |
| 2037 | 1863 April 09 | Hiram Sibley | S. B. Chase |
| 2038 | 1863 April 10 | Hiram Sibley | B. Flanders |
| 2039 | 1848 April 12 | Hiram Sibley | Amos A. Hendee |
| 2040 | 1859 April 16 | Hiram Sibley | John Dean Caton |
| 2041 | 1853 April 26 | Hiram Sibley | R. W Russell |
| 2042 | 1863 April 27 | Hiram Sibley | A. M Bigalow |
| 2043 | 1863 May 09 | Hiram Sibley | Western Union Telegraph |
| 2044 | 1864 May 09 | Hiram Sibley | Crane & Co. Moran |
| 2045 | 1851 May 17 | Hiram Sibley | L. O. Wilson |
| 2046 | 1857 May 18 | Hiram Sibley | John A.C. Gray |
| 2047 | 1863 May 21 | Hiram Sibley | A. Stone |
| 2048 | 1863 May 28 | Hiram Sibley | Perry McDonough Collins |
| 2049 | 1858 June 04 | Hiram Sibley | Balch |
| 2050 | 1862 June 11 | Hiram Sibley | Simon Cameron |
| 2051 | 1863 June 12 | Hiram Sibley | Peter L. Lawrance |
| 2052 | 1857 June 19 | Hiram Sibley | Henry/Speed JohnJ ORielly |
| 2053 | 1854 July 12 | Hiram Sibley | Edwin C. Litchfield |
| 2054 | 1863 July 19 | Hiram Sibley | Oliver H. Palmer |
| 2055 | 1860 July 23 | Hiram Sibley | Charles M. Stebbins |
| 2056 | 1864 July 23 | Hiram Sibley | C. P. Leland |
| 2057 | 1873 July 24 | Hiram Sibley | Hobart Campbell Mabers |
| 2058 | 1863 July 27 | Hiram Sibley | Perry McDonough Collins |
| 2059 | 1858 August 02 | Hiram Sibley | Isaac Russell Russell Elwood |
| 2060 | 1853 August 17 | Hiram Sibley | Thomas Archbold |
| 2061 | 1853 August 17 | Hiram Sibley | Erastus R. Lee |
| 2062 | 1857 August 28 | Hiram Sibley | Isaac Russell Elwood |
| 2063 | 1858 September 01 | Hiram Sibley | Cirus W. Field |
| 2064 | 1860 September 03 | Hiram Sibley | Thomas R. Walker |
| 2065 | 1860 September 08 | Hiram Sibley | |
| 2066 | 1851 September 23 | Hiram Sibley | Eli G. Runals |
| 2067 | 1874 September 26 | Hiram Sibley | Andrew Dickson White |
| 2068 | 1859 September 27 | Hiram Sibley | William Walcott |
| 2069 | 1875 October 04 | Hiram Sibley | R. A. Lancaster |
| 2070 | 1861 October 10 | Hiram Sibley | Cirus W. Field |
| 2071 | 1861 October 16 | Hiram Sibley | Perry McDonough Collins |
| 2072 | 1865 October 21 | Hiram Sibley | Perry McDonough Collins |
| 2073 | 1857 October 31 | Hiram Sibley | Emory Cobb |
| 2074 | 1857 October 31 | Hiram Sibley | Charles Minot |
| 2075 | 1859 November 05 | Hiram Sibley | Isaac Russell Elwood |
| 2076 | 1855 November 20 | Hiram Sibley | Jeptha Homer Wade |
| 2077 | 1861 December 06 | Hiram Sibley | Harvey J. Wood |
| 2078 | 1862 December 18 | Hiram Sibley | George Bliss |
| 2079 | 1857 December 24 | Hiram Sibley | William Walcott |
| 2080 | 1861 December 24 | Hiram Sibley | S. B. Chase |
| 2081 | 1860 December 26 | Hiram Sibley | Miranda L. Bond Sterling |
| 2082 | 1862 December 27 | Hiram Sibley | E. G. Lapham |
| 2083 | 1854 | Hiram Sibley | J. H. Reed |
| 2084 | 1864 | Hiram Sibley | Edward Creighton |
| 2085 | No Date ? | Hiram Sibley | George W. Bontwill |
| 2086 | No Date ? | Hiram Sibley | S. B. Chase |
| 2087 | No Date ? | Hiram Sibley | F Morris |
| 2088 | 1875 August 26 | Hiram Watson Sibley | Hiram Sibley |
| 2089 | 1875 November 24 | Hiram Watson Sibley | Hiram Sibley |
| 2679 | 1848 April 03 | Hiram Sibley | Eduard R. Tinker |
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