[Robert Bolton, Jr. (1848)] These marks indicate the com-mencement of the two mile line of the manor of Philipsburg, which, according to the royal patent,a extended two miles north from the mouth of the Croton, until it struck the southern line a See Patent of Philipsburg. The same kind of mark is found near the division line, between the townships of Yonkers and Greenburgh, both of them are pro-bably Indian lines. 504 HISTORY OF THE of Cortlandt manor. In an old " map of the township of Bedford, Stamford, Greenwich, tlie North river, and Keightawankor Cro-ton's river, by a survey, April the 6th, &c., 1763, by Charles Webb, surveyor," two spots are marked. First, "the station fixed by Cortlandt at the sand beach to measure up the river." This lies nearly mid-way between the Sing Sing brook and the next stream to the north. Secondly, a '' rock four chains and sixty links north of the brook," (the first stream above the Sing Sing brook,) " fixed by Bedford committee to begin to measure up the river."^ Mining operations were formerly carried on to a considerable extent in Sing Sing, under the flattering idea that silver ore ex-isted here; the old shafts sunk for this object are still visible. The following entries in the Secretary of State's office, refer to these mines. No. 54.] Stephen Lyon, Westchester county, town of Mt. Pleasant, about 100 rods south of the discoverers dock, and about 80 rods south of the farmers dock at Sing Sing landing, upon lands of John F. Marsh, (gold and silver.) Nov. 14, 1820.