Putting the lost vowel e back in the word, we have Yapclicinck, in Lenape Rapchdnek, "Where the stream ebbs and flows." The name is written Yampkanke in Indian deed. (Gerard.) The name is now applied to a small tributary of the Connecticut, but no doubt belongs to a place on the Connecticut where the current is affected by the tide. (See Connecticut.) Monowautuck is quoted as the Indian name of Mount Sinai, a village in the town of Brookhaven, a rough and stony district on what is known as Old Man's Bay, a small estuary surrounded by a ■salt-marsh meadow. The name seems to be an equivalent of Nunnawaugiick, "At the dry land." Old Man's Bay takes that name from the Great Neck called Cataconche, otherwise known as the Old Man's Meadow, and as the Old Field. "The two neckes or hoeces (hooks) of meadow that lieth next beyond the Old Man's Meadow" -- "with all ye privileges and appurtenances whatsoever, unto the Old Field." Presumably Man's was originally Manse (English), pronounced Mans, "the dwelling of a landholder with the land attached," and called Old because it was the first land or field purchased. (See Cataconche.) Connecticut, now so written and of record Connetquoit, etc, is not the name of the stream to which it is applied, but of the land on both sides of it. It is an equivalent of Quinnituckquet, "Longriver land," as in Connecticut. (Trumbull.) Quinnitiik, "Long river" ; with locative -ct or -it, "Land or place on the long-river." The stream is the outlet of Ronkonkoma Lake, and flows south to Fire-place Bay, where the name is of primary record. There were two streams to which it was applied ; one is a small stream in Islip, and the other, the largest stream on the island, as described above.