[Edward Manning Ruttenber (1906)] Papers, 99.) Long known as Buttermilk Falls and more recently as Highland Falls. In early days the falls were one of the most noted features on the lower Hudson. They were formed by the discharge over a precipice of the outlet waters of Bog-meadow Brook. They were called Prince's Falls in honor of Prince Maurice of Holland. The name was extended to the creek in the Staats survey--Prince's Kill. Manahawaghin is of record as the name of what is now known as Iona Island, in connection with "A certain tract of land on the west side of Hudson's River, beginning on the south side of a creek called Assinapink, together with a certain island and parcel of meadow called Manahawaghin, and by the Christians Salisbury Island." The island lies about one mile south of directly opposite Anthony's Nose, and is divided from the main land by a narrow channel or marshy water-course. The tract of land lies immediately north of the Donderberg; it was the site of the settlement known as Doodletown in Revolutionary history. The name is probably from _Mannahatin,_ the indefinite or diminutive form of _Mannahata,_ "The Island"--literally, "Small island." The last word of the record form is badly mangled. (See Manhattan.) [Illustration: Northern Gate of the Highlands]