David T. (Thomas) Valentine (1801 - 1869) served as the Clerk of the Common Council of New York City. He edited and published a series of New York City almanacs and fact books entitled Manual of the Corporation Of The City of New York. Valentine's Manual, as it came to be called, included facts about the City of New York, city council information, city history, and reported on the progress of public works such as Central Park. The production of this annual manual was the responsibility of the Clerk of the City of New York, a position held at different times by D. Valentine and by Joseph Shannon, who also produced a similar manual. Valentine used his manual to reproduce some of the rarest and most important maps of New York City ever created.