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: Robert Anderson Van Wyck (1849-1918) was the first Mayor to take office after the consolidation of the City of New York in 1898. This collection consists of the subject files and correspondence of his administration.