Born 21 September 1794 - Died 12 July 1871 - Age 76.

• Assistant Professor of Mathematics, USMA, August 30, 1818 to September 1, 1823.
• Principal Assistant Professor of Mathematics, USMA, September 1, 1823 to October 3, 1825.
• Professor of Mathematics and Natural Philosophy, Geneva College, NY, 1825-1848.
• Principal of the Free Academy, NY City, July 19, 1948 to March 30, 1866 and of the College of the City of New York (to which name the Academy was changed by law), March 30, 1866 to July 21, 1869. He is now referred to as the first President of CCNY.
• Professor of Moral and Intellectual Philosophy, CCNY, October 15, 1851 to July 7, 1852.
• Professor of Moral, Intellectual, and Political Philosophy, CCNY, July 7, 1852 to July 21, 1869.
• Emeritus Professor, CCNY, July 21, 1869 until his death. 

Honorary Degrees:

• A.M., Nassau Hall, Princeton, NJ, 1823.
• LL.D., Kenyon College, Gambier, OH, 1842.
• LL.D., Columbia College, NY City, 1849.
• M.D., University of Pennsylvania, 1850. 

Biography:

When Webster left USMA he was almost certainly assisted in getting a job at Geneva College, today Hobart and William Smith College, by letters of recommendation from Davies and Thayer. When he resigned at West Point, Thayer requested that  Dennis H. Mahan remain on the faculty. 

Manuscripts:

• Webster, Horace, "Letter, 1854 May 23, New York Free Academy [to George Cullum]," holograph manuscript with typed copy, 5 p. ; 32 x 20 cm, SPEC USMA.
  Summary:
  Army officer, Professor of Math, USMA, President CCNY, 1845-1869. Response to circular
  requesting information about the history of West Point and cadet living conditions in the early years
  of the Academy, requirements for admission, academic standards, curriculum and the
  reorganization of the Military Academy under Thayer's administration
  

Obituaries:

Assembly, April 1872.

Cullum #183: B-VT 21Sept94:Inf: Asst Prof Math USMA 18-25: Resd 25 1LT: Prof Math & Nat
Phil Geneva College 25-48: Pres Coll City of NY from its orgn 48 to 69: Distinguished Educator:
Many degrees: D-NY 12Jul71 a-76: Ob-AR 72. [From 1990 Register of Graduates]

File started. It includes the Cullum entry which has a nice obit by Davies. 

Question: Do I have a typo here. Did he die at age 72?

Sources Searched:

• Nothing listed in OhioLink, December 97.
• Nothing at Hobart at William Smith Library, November 2000.

References:

Arney, Chris, West Point's Scientific 200: Celebration of the Bicentennial. Biographies of 200 of West Point's Most Successful and Influential Mathematicians, Scientists, Engineers, and Technologists, 2002.