his degree of B.A. in 1655, and that of M.A. in 1658, Mr. Locke for some time closely applied himself to the study of physic, going through the usual courses preparatory to the practice; and it is said that he got some business in that profession at Oxford. So great was the delicacy of his constitution, however, that he was not capable of a laborious application to the medical art; and it is not improbable that his principal motive in studying it was, that he might be qualified when necessary to act as his own physician. In the year 1664, he accepted of an offer to go abroad, in the capacity of secretary to sir William Swan, who was appointed envoy from king Charles II. to the elector of Brandenburgh, and some other German princes; but returning to England again within less than a year, he resumed his studies at Oxford with renewed vigour, and applied himself particularly to natural philosophy. While he was at Oxford in 1666, an accident introduced him to the acquaintance of lord Ashley, afterwards earl of Shaftesbury. That nobleman, having been advised to drink the mineral waters at Astrop, for an abscess in his breast, wrote to Dr. Thomas, a physician in Oxford, to procure a quantity of them to be in readiness against his arrival. Dr. Thomas, being obliged to be absent from home at that time, prevailed with his friend Mr. Locke to execute this commission. But it happening that the waters were not ready on the day after lord Ashley's arrival, through the fault of the person who had been sent for them, Mr. Locke found himself obliged to wait on his lordship, to make excuses for the disappointment. Lord Ashley received him with his usual politeness, and was satisfied with his apology. Upon his rising to go away, his lordship, who had received great pleasure from his conversation, detained him to supper, and engaged him to dinner on the following day, and even to drink the waters, that he might have the more of his company. When his lordship left Oxford to go to Sunning-hill, he made Mr. Locke promise to visit him there; as he did in the summer of the year 1667. Afterwards lord Ashley invited Mr. Locke to his house, and prevailed on him to take up his residence with him. Having now secured him as an inmate, lord Ashley was governed entirely by his advice, in submitting to have the abscess in his breast opened; by which operation his life was saved, though the wound was never closed. The success which attended this operation gave his lordship a high opinion of Mr. Locke's medical skill, and contributed to increase his attachment to him, notwithstanding that he regarded this as the least of his qualifications. Sensible that his great abilities were calculated to
