Abstract: John F. Hylan was the 96th Mayor of New York City from 1918 to 1925. This collection contains the material generated by the daily workings of the Office of the Mayor during his two-term mayoral administration.

Abstract: John P. Mitchel was the 95th Mayor of New York, serving during the World War I era from 1914-1917. This collection consists of the records produced by the Office of the Mayor during his administration.

Abstract: Seth Low (1850-1916) served as the Mayor of New York from 1902-1903. This collection consists of a selection of materials produced by his mayoral administration.