[Robert Bolton, Jr. (1848)] b DistunieU'p Gazetteer, N. Y. COUNTY OF WESTCHESTER. 377 YORKTOWN. Wiiite Plains, distant forty-two miles from New York, and one hundred and seventeen from Albany, ''bounded north by Put-nam county, east by Somers and New Castle, south by New Castle, and west by Cortlandt. Its length, north and south, ten miles, and it is nearly four miles wide. Prior to 1788, Yorktown and Somers constituted the old town-ship of Hanover, within Cortlandt's manor. »• A portion of the former early acquired the name of Gertrude's borough, in honor of Gertrude Beeckman, wife of Colonel Henry Beeckman, and one of the daughters and devisees of Stephanus van Cortlandt. The Mohegan term Appa?naghpogh appears to iiave been ap-plied to the whole Indian territory within the manor, west of Cortlandtown. The eastern section of Yorktown still bears the name of Afjiaioalk, probably an abbreviation and corruption of the former term, thus Appamaghpogh, Amag/ipogh, or Ama-walk. The lands of Appa?nog/tpogh were originally granted to Stephamus van Cortlandt in 1(383, by the Indian sachems Pewe-mind, Oskewans, and others, as mentioned in our description of Somers, (fcc. The principal aboriginal settlement in this part of Appam-aghpogh occupied the summit of Indian hill, a vast height, wliich rises to an elevation of nearly six hundred feet above the northern margin of Lake Magrigaries, (Hollow Lake) situated in Jefferson valley. On the southern side of the hill lies the Indian burying -ground.