The information derived from this respectable old man, was, that his forefathers had long been established at Arnheim; that his father, Nicholas, was a paper-manufacturer in that city, as others of the family had been; and that his father’s brother, William, went with his family to North America, where he some time afterward, as he had understood, established the paper-mills near Germantown. He further stated, that he had only one child, a daughter, who was married, and resided at the Hague; and that he was, himself, as he believed, the last of his family-name, remaining in the United Provinces. Although plain in his dress and manners, and in the general appearance of his household, this person seemed to be pleased in shewing the writer a family-seal, on which was engraved a coat of arms. The armorial device represented a castellated house, or chateau; on the left side of which was a horse, standing on his hind feet and rearing up, with his fore feet resting against the wall of the house: and this house very much resembled the chateau in the armorial bearing of the Spanish family “_de Fuentes, señores del Castillio_,” as represented in Dubuisson’s French Collection of Arms: The seal having been much worn, the lines, &c. describing the several tinctures of the bearing, could not be discerned; and, therefore, it cannot be properly blazoned. At the same time, the old gentleman did not omit to mention, that his mother was a _De Ruyter_; and that her arms were, a mounted chevalier armed cap-à-piè. These facts, relative to the origin of the American Rittenhouses, did not appear to the writer to be unworthy of notice. They are correctly stated, being taken from a memorandum made by him, immediately after his interview with Adrian Rittinghuysen. The introduction of this slight sketch of the occupation and condition of some of the European ancestors of our Philosopher, into his Life, may be the more readily excused, since the great Newton himself was not inattentive to such objects. There is, indeed, implanted by nature in the human mind, a strong desire to become acquainted with the family-history of our forefathers. Hence, Sir Isaac Newton left, in his own hand-writing, a genealogical account or pedigree of his family; with directions, subjoined thereto, that the registers of certain parishes should be searched, from the beginning to the year 1650; and he adds—“Let the extracts be taken, by copying out of the registers whatever may be met with, about the family of the Newtons, in words at length, without omitting any of the words.” This investigation and enquiry of Sir Isaac, was made in the sixty-third year of his age; and he himself caused the result to be entered in the books of the herald’s office.