1. 1930 Real Estate Plat-Book of the City of Trenton and Borough of Princeton, Mercer County, New Jersey (Plate 11 of 48, Trenton) Maps Public content 1930. In addition to the title page, the 1930 Plat-Book contains three indices and 48 detailed map plates of the city of Trenton, and 6 detailed map plat... Franklin Survey Co.