The Mamaroneck river, above mentioned, forms the eastern boundary of the town, and derives its source from Horton's pond. This stream is more remarkable for the romantic valleys it forms, and the rich country it winds through, than for its extent -- being generally buried within deep banks. Near its junction with the Sheldrake, (directly north of the village,) it forms a beautiful valley between high rolling hills, upon the sides of which, are boulders of enormous size.

It is the boundary line between Mamaroneck and Rye, and is crossed near its mouth by a substantial iron bridge.

The Sheldrake rises from two springs in Scarsdale.0 The general surface of the surrounding country is hilly, and abounds in wild and romantic scenery.

a The Sheldrake Springs are situated on the land of John Hatfield,

THE TOWN OK MAMARONECK.

Mamaroneck is .one of the most ancient villages in the county, having been laid out in, or about, the year 1660. It now contains two churches, two carriage factories, several stores and about one hundred dwellings.*

The former divisions of the high ridge, originally called " Good-Success Ridge," (facing the bay and post road,) are still distinguished by the names of their original proprietors, viz. : Heathcote, Nelson and Budds' hills. Near the entrance of the village from the west, is situated Heathcote Hill, the property of Edward F. de Lancey, Esq.

The old de Lancey residence, upon " Heathcote Hill," stands on the site of a stately brick manor-house, erected by Colonel Caleb Heathcote about the year 1700, as the manor-house of his manor of Scarsrioathcote Hill, Mamaroneck.