The following extract of a letter, which Professor Rusk was so obliging as to address to the writer of these memoirs, in the spring of the year 1812, in answer to some questions proposed by the memorialist, favours the presumption, that our philosopher in some points dissented from the opinions of very respectable Calvinistic Divines, on the subject of religion. “I understood from the Rev. Dr. Green,” says the learned Professor, that his late colleague, the Rev. Dr. Sproat, had informed him, that in a visit he once paid to Dr. Rittenhouse, they were led accidentally to converse upon a religious subject, on which they held different opinions. Dr. Sproat, in defending his opinions, quoted several texts of scripture; but observed, after doing so; “Perhaps, Mr. Rittenhouse, you do not admit of the validity of arguments derived from the bible.” “Pardon me, Sir,” (said Mr. Rittenhouse,) “I admit the divine authority of the contents of that book.” Another fact stated by Dr. Rush, at the same time, and which was also communicated to the memorialist, by a very near and dear friend of the deceased, is thus related by the Doctor: “His late worthy companion, Mrs. Rittenhouse, informed me, that the last sourse from whence he derived intellectual and moral pleasure, was Dr. Price’s excellent sermon upon the _Goodness of God_, which she read to him, at his request, on the two successive days before he died.” It may not be thought unworthy of being remarked on this occasion, that Mr. T. Dobson, of Philadelphia, republished Price’s Sermons, in the year 1788, and that Mrs. Rittenhouse’s name appears in the list of subscribers to that edition. In Dr. Rush’s letter, just quoted, he introduces the subject in these terms. “In answer to your question, relative to the religious opinions of your late uncle and my excellent friend, Dr. Rittenhouse, I am happy in being able to inform you, that I have no doubt of his having been a sincere believer in the most essential doctrines of the Christian religion: the ground upon which I formed this opinion, were derived not only from many incidental remarks in its favour, that fell from him in our conversations upon other subjects, but from the testimony of persons upon whose correctness I have the fullest reliance.” Upon the whole it appears, that although our philosopher was, most probably, not strictly Calvinistical in his religious creed, he was nevertheless a pious man, and a sincere Christian in the fundamental articles of his faith. -----