Music, the lighter kinds of literature, both as a reader and occasionally as an author, and the innocent recreations of society, which no one enjoyed more keenly than himself, were the means by which Jenner lightened the burden of his professional labours; but his chief amusement was natural history, including geology, a science then in its infancy, for the study of which his position in the vale of Gloucester afforded ample opportunity, the neighbourhood abounding with fossil remains, and exhibiting a great variety of terrestrial structure. Towards subjects of this nature he was led, not only by his original bias, but by his correspondence with Hunter, Banks, and Parry. In 1778 he formed a medical society, which held its periodical meetings at Rodborough, for the purpose of communicating professional information and promoting a friendly feeling among the members. In furtherance of these objects, Jenner contributed several important and original papers, the substance of which is now embodied in medical science, without his property in them being generally known. Among these were essays on the nature and causes of Angina Pectoris, on a peculiar disease of the heart occurring in acute rheumatism, and on several of the more severe affections of the eye. He also belonged to another medical society, meeting at Alveston near Bristol, to the members of which, who were men of congenial dispositions with his own, he was personally much attached. Upon one topic, however, they did not agree; for it is said that he was in the habit of enlarging so frequently upon his favourite speculation of the cow-pox, that the subject was at length proscribed, and he was jestingly forbidden to renew it on pain of expulsion. This club was for many years a source of much enjoyment and advantage to him, and we may suppose that he was a very principal contributor to the diversion of the other members; for it ceased to exist in 1789, when other objects began to engross the time that he could spare from his practice. In March of the previous year, at the age of thirty-seven, he married Miss Catharine Kingscote, by whom he had several children. The choice appears to have been a very fortunate one for his domestic happiness.