“The last visit I ever received from Mr. Rittenhouse was about the middle of June, 1796. He called at my humble habitation in Fifth street, to inquire about my health, and to learn from me the result of the experiments and inquiries in which he knew I was, at this time engaged, concerning the mode of generation and gestation of our opossum, an animal to whose economy and manners he had himself paid some attention, and whose history he justly considered one of the most interesting in the whole range of zoology. “It was on this occasion, that our excellent friend first informed me, that he had received a diploma from the Royal Society. He observed, with a tone of voice and with a certain expression of countenance, which were not calculated to afford me any pleasure, “that a few years ago, such a mark of respect from that illustrious body would have been received by him with pleasure and with pride.” “In fact, Mr. Rittenhouse, now and for some months past, was strongly impressed with the idea, that his career of usefulness and virtue was nearly at an end. He had several times, during the preceding part of the spring and summer, intimated to me (and doubtless to others of his friends) his impressions on this head. In what precise condition of his system, whether physical or intellectual, these impressions were founded, I have only been able to form a distant, and unsatisfactory conjecture. “A few days after this interview, viz. on the 22d of June, I was sent for to visit Mr. Rittenhouse. I found him in his garden, where he loved to walk, and soon learned that he laboured under a severe attack of cholera, accompanied, however, with more fever than we generally find with this disease; and with a great increase of that violent pain and sense of oppression at the region of his stomach, to which he had been subject for at least thirty years. Notwithstanding his age, the debility of his system, and the unfavourable state of the season, I ventured to flatter myself, that the attack would not prove mortal. On the following day, however, finding him no better, but rather worse, I requested permission to call in the aid of another physician; and having mentioned the name of Dr. Adam Kuhn, that gentleman accordingly visited our friend, in company with me, during the remainder of his illness.