Without a doubt, one of the finest wall maps of <b><a href="//commons.wikimedia.org/wiki/Category:Suffolk_County,_New_York" title="Category:Suffolk County, New York">Suffolk County</a></b>, eastern Long Island, New York, ever made.  This monumental 1858 wall map covers the eastern part of Long Island roughly from Huntington to Montauk.  
<ul><li>Divided into two main sections, upper and lower.</li></ul><dl><dd><ul><li>The upper segment, mostly confined to the upper right quadrant, focuses on Huntington, Smithtown, Islip, and Brookhaven, including most of Fire Island and Oak Island.</li>
<li>The lower section, and the primary focus of the map as a whole, covers the eastern extension of Long Island including both forks, Brookhaven, Riverhead, Southampton, Southold, and East Hampton, as well as Gardiners Island and Shelter Island.</li></ul></dd></dl><ul><li>The upper left quadrants of the map as well as any empty zones in other sections are dedicated to detailed town plans.  These include Cold Spring, Amityville, Smith town, East Setauket, Patchogue, North Port, Babylon, Riverhead, Penataquit, Port Jefferson, Greenport, Sag Harbor, Southold, Bridgehampton, East Moriches, Millers Place, Comac, West Huntington, Bellport, Center Moriches, Mattituck, Aquebogue, Jamesport, New Suffolk, Stony Brook, East Marion, Orient, South Port, Amagansett, East Hampton, Sayville, Southampton, and Cutchoge.</li>
<li>The detail throughout is extraordinary, with Chase's survey work being, by far, the most accurate and in depth study of the region undertaken in the first half of the 19th century.  Chase notes roads, farms, bridges, and the individual family names of various properties.  In addition to noting property owners and important households, chase also includes business directories for the largest and most important towns.</li>
<li>There are additionally five engraved views including the Wyanbank House of Jeremiah Terry in Greenport, the residence of Stephen Haynes of Scuttle Hole, the Farmhouse of Elisha King of Good Ground, the Riverhead Courthouse, and the Summer Residence of  C. W. and J. T. Moore of Aquebogue.</li>
<li>The surveys for this map are the work of J. Chase Junior.  The map was a joint publishing venture by Robert Pearsall Smith and John Douglass, whose adjacent offices were located at  517, 519, and 521 Minor Street, Philadelphia, PA.  Dated and copyrighted, Entered According to Act of Congress in the Year 1858 by Robert Pearsall Smith in the Cleark's Office of the District Court of the Eastern District of Pennsylvania.</li></ul>
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1858 (dated)
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