Drawing on the holdings of the New York Public Library (in particular the Lawrence H. Slaughter Collection), and sponsored by the National Endowment for the Humanities, this online exhibit is devoted to offering a number of historically significant maps of the Mid-Atlantic region up to 1850. The site begins with a brief essay on the nature of the items featured on the site and continues with three other sections -- Basics of Maps, Maps Through History, and Geographical Areas. The Basics of Maps section provides a valuable introduction to the various aspects of cartography and the basic layout of maps. Maps Through History draws the user's attention to the importance of nautical maps of the area, most notably those of the Hudson River and charts of the North Atlantic. The final section, Geographical Areas, has a selection of important maps beginning with early maps of New York City neighborhoods and finishing with a survey map of the tidewater region of Virginia completed by Peter Jefferson, father of Thomas Jefferson.