Hudson, on his exploration of the river which now bears his name, sailed into the bay immediately north of Butter Hill, now known as Newburgh Bay, on the morning of the 15th of September, 1709. After spending several days in the northern part of the river, he reached Newburgh Bay on his return voyage in the afternoon of September 29th, and cast anchor, or as stated in Juet's Journal, "Turned down to the edge of the mountains, or the northernmost of the mountains, and anchored, because the high lands hath many points, and a narrow channel, and hath many eddie winds. So we rode quietly all night." The hill or mountain long known as Breakneck, on the east side of the river, may be claimed as the northernmost, which would place his anchorage about midway between Newburgh and Pollepel Island. Quassaick, now so written, is of record, _Quasek,_ 1709; "Near to a place called _Quasaik,_" 1709-10; _Quasseck,_ 1713; "_Quassaick_ Creek upon Hudson's River," 1714. It was employed to locate the place of settlement of the Palatine immigrants in 1709--"The Parish of Quassaick," later, "The Parish of Newburgh." It is now preserved as the name of the creek which bounds (in part) the city of Newburgh on the south. "Near to a place called Quasek," indicates that the place of settlement was located by the name of some other place which was near to it and generally known by the name. The late Dr. E. B. O'Callaghan read it, in 1856: "From _Qussuk,_ 'Stone,' and _-ick,_ 'Place where,' literally, 'A place of stone,'" the presumed reference being to the district through which the stream flows, which is remarkable for its deposit of glacial bowlders. The correctness of this interpretation has been questioned on very tenable grounds. _Qusuk_ is not in the plural number and _-uk_ does not stand for _-ick._ Eliot wrote: "_Qussuk,_ a rock," and "_Qussukquan-ash,_ rocks." _Qussuk,_ as a substantive simply, would be accepted as the name of a place called "A rock," by metonymie, "A stone." No other meaning can be drawn from it. It does not belong to the dialect of the district, the local terms being _-ápuch,_ "Rock," and _-assin,_ or _-achsûn,_ "Stone." Dr. O'Callaghan's interpretation may safely be rejected. William R. Gerard writes: "The worst corrupted name that I know of is _Wequaskeg_ or _Wequaskeek,_ meaning, 'At the end of the marsh.' It appears in innumerable forms--_Weaxashuk, Wickerschriek, Weaquassic,_ etc. I think that Quassaick, changed from Quasek (1709), is one of these corruptions. The original word probably referred to some place at the end of a swamp. The word would easily become Quasekek, Quasek, and Quassaick. The formative _-ek,_ in words meaning swamp, marsh, etc., was often dropped by both Dutch and English scribes." This conjecture would seem to locate the name as that of the end of Big Swamp, nearly five miles distant from the place of settlement. My conjecture is that the name is from Moh.