Manuscript and letterpress copies of outgoing correspondence of the Mayor's Office. The letters are addressed to individuals in the city and elsewhere who were engaged in some type of business with the municipal government. Several of the volumes also include copies of the Mayor's messages to the City Council (see also the original messages arranged by councilmanic body and the copies described as Office of the Mayor, Messages to the Council).

Among the correspondents noted are Benjamin Henry Latrobe, Edward Livingston, Thomas B. Robertson, James Brown, Judah Touro, William C. C. Claiborne, Jacques Philippe Villere, Edward Douglass White, Daniel Webster (dated July 9, 1834), Pierre Soule, James Buchanan (dated August 5, 1848), Judah P. Benjamin, and Isaac Johnson.

The 1811-1827 volume is partially indexed (L-Z). Volumes for all or portions of 1838- 1843, 1851-1852, and 1855-1860 are missing.

Part of a larger series of Letterbooks. Only Letterbooks until 1862 are described in this series.