Caquancy is so badly corrupted that its derivative is not recognizable. Aquamack seems to be the same word that we have in Accomack, Va., meaning, "On the Other side," or "Other side lands." In deed to Florus Crom is mentioned "Another parcel of upland and meadow known by the name of Ahequerenoy, lying north of the brook called Florus Falls and extending to Stony Point," the south line of which was the north line of the Haverstraw lands as later understood. The tract was known for years as "The end place." Sankapogh, Indian deed to Van Cortlandt, 1683 -- Sinkapogh, Songepogh, Tongapogh -- is given as the name of a small stream flowing to the Hudson south of the stream called Assinapink, locally now known as Swamp Kill and Snake-hole Creek. The stream is the outlet of a pool or spring which forms a marsh at or near the foot of precipitous rocks. Probably an equivalent of Natick Sonkippog, "Cool water." Poplopen's Creek, now so written, the name of the stream flowing to the Hudson between the sites of the Revolutionary forts Clinton and Montgomery, south of West Point, and also the name of one of the ponds of which the stream is the outlet, seems to be from English Pop-looping (Dutch Loopen), and to describe the stream as flowing out quickly -- Pop, "To issue forth with a quick, sudden movement" ; Looping, "To run," to flow, to stream. The flow of the stream was controlled by the rise and fall of the waters in the ponds on the hills, seven in number. The outlet of Poplopen Pond is now dammed back to retain a head of water for milling