Y., vii, 153, 158.) Poughquag, the name of a village in the town of Beekman, Duchess County, and primarily the name of what is now known as Silver Lake, in the southeast part of the town, is from Apoquague, (Mass.), meaning, "A i^aggy meadow," which is presumed to have adjoined the lake. It is from Uppuqui, "Lodge covering," and -aiike, "Land" or place. (Trumbull.) Pietawickquassic!:, a brook so called which formed a boundmark of a tract of land conveyed by Peter Schuyler in 1699, described as "On the east side of Hudson's River, over against Juffrou's Hook, at a place called by the Christians Jan Casper's Creek." The creek is now known as Casper's Creek. It is the first creek north of Wappingers' Kill. Schuyler called the place Rust Plaest (Dutch, Rust-plaats), meaning "Resting place, or place of peace." The Indian name has not been located. It is probably a form or equivalent of P'fukgii-suk, "A bend in a brook or outlet." V/assaic, a village and a creek so called in the town of Amenia, Duchess County, appears in N. Y. records in 1702, Wiesasack, as the name of a tract of land "lying to the southward of Wayanaglanock, to the westward of Westenhoek creek." (Cal. N. Y. Land Papers, 58) : later, "Near a place called Weshiack" (lb. 65), and thence northerly to a place called Wishshiag, and so on about a mile northwest of ye Allum rocks." ^ (lb. 75.) The name seems to have been applied to the north end of West Mountain, where is located the ravine known as the Dover Stone Church, about half a mile west of the village of Dover Plains. The ravine is 20 to 25 feet wide at the bottom, i to 3 feet at the top, 30 to 40 feet long,