It is perhaps more interesting, it is certainly more important, to notice the influence exerted upon one mind by another, than to examine the influences of any material objects upon human nature. In this light we may view with pleasure the relations which existed between Jenner, his elder brother already mentioned, and the great anatomist, John Hunter. The ties of affection and esteem must have been strong which drew the young doctor from the attractions of London, from constant association with his admired friend in his studies, from opportunities to inquire such as those afforded by the arrangement of Sir Joseph Banks’s collection made during Captain Cook’s celebrated voyage, from prospects of gain and worldly advancement, to the retirement of a country village, the isolation and the simplicity of rural existence. We can hardly overestimate the benefits derived by the developing mind of the young doctor from his daily intercourse for two years with such a preceptor as John Hunter. The impression was mutual, for we find Hunter years afterwards writing to Jenner, “I do not know any one I would sooner write to than you: I do not know anybody I am so much obliged to.” A correspondence full of interest on subjects of natural history was kept up between them. Hunter’s appreciation of his friend’s attainments was shown markedly when he formed the plan of a school of natural history and human and comparative anatomy, and asked Jenner to come and be his partner in the undertaking. Very many particulars of experiments and inquiries in natural history by Jenner were communicated to Hunter, and were of essential service to him. His most important published paper in natural history was that on the Cuckoo, published in the “Philosophical Transactions” for 1788. Jenner’s name has been so exclusively connected in the popular mind with the subject of vaccination, that his ability as a practitioner and his originality in many departments of medicine and surgery have been somewhat lost sight of. No doubt this was much aided by his own modesty; but in the treatment of many diseases his views, founded on the improved anatomy and physiology he had learned from Hunter and his own acute observation, were far in advance of his time.