The true " aboriginal name of the East Neck was " Mamaranock " the same as the town and village bears to-day under the later spelling of " Mamaroneck." That portion of it between the HarboUr on the east and Pipin's brook and the salt creek into which it runs on the west, bears the name of " De Lancey's Neck " from the fact that it has been possessed as a whole for more than a century and until a few yearsago, and in part still is possessed, by the family of Gov. James de Lancey, the son-in-law of Col. Caleb Heathcote, the purchaser of the whole East Neck in 1697. It formed the largest part of the "demesne lands" of Colonel Heathcote's ilanor of Scarsdale, and as such was held by his widow until her death in 1736, when an undivided half descended to her daughter Mrs. James de Lancey, who by agreement with her brother-in-law Dr. Lewis Johnston of New Jersey continued in the possession and control of the other undivided half until 1774, when it was divided in the

2 Formerly a portion of the western piirt of the farm of Mr. Peter .Jay Muuro, and later owned by James T. Roosevelt. 'The old "Duncan" or " Danbeny " farm. < Deed-Book iii. 37, Sec. State's office, .\lbany. Ante, p. 145. ' sVol. i. p. 2S2. » Vol. i. p. 463.

HISTORY OF AVESTCHESTER COUNTY.

Partition of that year of the undivided portions of the Manor of Scarsdaie. Subsequently John Peter de Lancey the son of Mrs. De Lancey who had succeeded to some of his mother's lauds purchased all the rest of the lands on De Lancey's Neck from his brother, and sister, and cousins, and thus became the owner of the whole Neck, nearly a century ago.