The History of the Several Towns, Manors, and Patents of the County of Westchester (1881 revised edition, Vol. I)
The commissioners appointed for settling the lines, assembled at Greenwich, April 29th, 1725, when they came to the following agreement as to the means of ascertaining the lines, viz.: -- "They are the westernmost line, called eight miles, the line running east north-east, thirteen miles and sixty-four rods from the eight mile line, the line called parallel with the Hudson's River, and twenty miles from it, extending from the end of the line thirteen miles and sixty-four rods northward to Massachusetts line; the parallel line was in t~wo lines, having one angle in it. The equivalent land they estimated at 61,440 acres, which has to be taken from Connecticut, on the east side of the parallel line."a
The angle above mentioned (sometimes called Cortlandt's Point) was situated near the south-west shore of Lake Wepuck, (Long Pond), on the lands of Edwin Bouton. Here the commissioners who surveyed the manor of Cortlandt in 1734, erected a monument, which they "deemed and esteemed twenty miles distant from Cortlandt's Point, at the mouth of the Highlands."
"The complete settlement of the boundary line, (says the historian Smith,) was not made till the 14th of May, 1731, when indentures certifying the execution of the agreement in 1725, were mutually signed by the commissioners and surveyors of both colonies.
Upon the establishment of this partition, a tract of land lying on the Connecticut side, consisting of above sixty thousand acres, from its figure called the Oblong, was ceded to New York, as an equivalent for lands near the Sound, surrendered to Connecticut^