To each lot was appendant an undivided eighth right to commonage and pasture in the two mile bounds. The precise extent of these bounds we know from the Deed to Disbrough, which calls them " Mammaroneck limmits " and describes the tract as " being in length two miles and in Breadth one mile and a half and Twenty eight rods." The length was from the Westchester Path northward, and the breadth was from Mamaroneck River to Dirty Swamp on the west. "Dirty Swamp" being the swampy ground over which the road passed near and east of the intersection of the present Weaver Street. The swamp began some distance north of the Road and extended across it to the salt water, a little stream or ditch running from it under the road in old times through a stone culvert, sometimes dignified by the name of" Dirty Swamp Bridge."

As soon as Colonel Heathcote obtained his Manor- Grant, and about two months thereafter he obtained, on the 11th of June 1701, from the two Indian chiefs of the neighborhood Patthunk and Wapetuck an Indian deed of confirmation for this two mile tract to himself and the seven other persons who in 1701 were the owners of these '' allottments or house " or " home " " lotts." There were himself, Caleb Heathcote, Capt. James Mott, William Penoir,' John Williams, Henry Disbrough, Alice Hatfield, John Disbrough, and Benjamin Disbrough.- This was to satisfy all persons desirous of settling in Mamaroneck, that there would be no difficulty with the natives. About five years later Colonel Heathcote suggested to the owners of the house lots that instead of keeping all the rest of the two mile bounds as undivided property, that they should have it laid out and divided among themselves in severalty.