N.Y. State Law § 33
Title and jurisdiction to the following described tract or parcel of land has been ceded to the United States by this state upon condition that the jurisdiction so ceded should not prevent the execution on such tract or parcel of any process, civil or criminal, issuing under the authority of this state, nor the operation of the public laws of this state upon such tract, so far as the same might not be incompatible with the free use and enjoyment of the premises by the United States, for the purpose of the erection of magazines, arsenals, barracks and other needful buildings.
Town of Greenbush. A tract of land in the town of Greenbush in the manor of Rensselaerwick, county of Rensselaer and state of New York, which was leased by Stephen VanRensselaer to Christopher Yates, on the 16th day of August, 1790, bounded and described as follows: "Beginning at a stake and stones standing at the distance of 12 chains and 45 links from the southwest corner of the kitchen on the premises, on a course N. 49º 30' W., and running thence N. 49º 30' W., 1 chain and 6 links; thence N. 59º 45' W., 6 chains and 78 links; thence N. 29º E., 3 chains and 73 links; thence N. 16º E., 9 chains and 24 links; thence S. 60º E., 7 chains and 20 links; thence S. 34º E., 1 chain; thence S. 50º E., 2 chains; thence N. 15º E., 29 chains; thence S. 39º E., 38 chains and 12 links; thence due East 10 chains; thence S. 11º 30' E., 48 chains and 80 links; thence due W. 32 chains and 20 links; thence due N. 10 chains; thence N. 26º W., 5 chains and 53 links; thence S. 37º, 6 chains and 47 links; thence N. 18º W., 2 chains and 27 links; thence N. 10º W., 3 chains and 71 links; thence N. 2º W., 3 chains and 58 links; thence N. 70º E., 1 chain and 18 links; thence N. 18º W., 4 chains and 87 links; thence N. 77º 40' W., 2 chains and 97 links; thence S. 15º 40' W., 12 chains and 31 links; thence S. 9º E., 8 chains and 34 links; thence S. 57º E., 2 chains and 44 links; thence S. 17º W., 9 chains; thence N. 68º W., 22 chains and 30 links; thence due S. 4 chains and 40 links; thence N. 60º E., 6 chains; thence N. 29º W., 6 chains and 20 links; thence N. 13º W., 3 chains; thence S. 68º E., 5 chains and 21 links; thence S. 32º 18' E., 6 chains and 40 links; thence S. 3º 42' W., 1 chain and 80 links; thence S. 89º 48' E., 4 chains and 30 links; thence N. 3º 42' E., 9 chains and 90 links; thence S. 86º 18' E., 6 chains and 20 links; thence N. 3º 42' E., 14 chains and 50 links; thence N. 86º 18' W., 6 chains and 20 links; thence S. 3º 42' W., 3 chains and 80 links; thence N. 42º 18' W., 10 chains and 80 links, to the beginning, containing 261 acres and .3 of an acre;" acquired for the purpose of erecting magazines, arsenals, barracks and other needful buildings.
N.Y. State § 33