Locke returned to England towards the end of February, 1665-66, and was at once offered the post of secretary to the Earl of Sandwich, who was on the point of setting out as ambassador to Spain. He wavered for a short time, but, though doubtful whether he had not "let slip the minute that they say every one has once in his life to make himself," he finally declined the offer. Before settling down again in Oxford, he spent a few weeks in Somersetshire, paying probably, amongst other visits, one he had promised himself to Strachey at Sutton Court, "a greater rarity than my travels have afforded me; for one may go a long way before one meets a friend." During his stay in Somersetshire, he attempted to try some experiments in the Mendip lead-mines with a barometer which had been sent to him for the purpose by Boyle. But the miners and their wives made a successful resistance. "The sight of the engine and my desire of going down some of their gruffs gave them terrible apprehensions. The women, too, were alarmed, and think us still either projectors or conjurors."

At the beginning of May, Locke was again in his rooms in Oxford. He seems to have lost no time in setting to work afresh on the studies which might qualify him to exercise the profession of medicine. In his letters to Boyle, he makes frequent reference to chemical experiments and to collecting plants for medical purposes.

It is an unexplained circumstance that, notwithstanding a letter to the Hebdomadal Board from Lord Clarendon, then Chancellor of the University, signifying his assent to a dispensation, enabling Locke to accumulate the degrees of Bachelor and Doctor in Medicine, he never took those degrees. The obstacle may have arisen from himself, or, more probably, it may have been due to some sinister influence on the Hebdomadal Board preventing the assent of that body to the required decree. Any way, it is curious that eleven days after the date of Lord Clarendon's letter is dated the dispensation from the Crown (already referred to on page 13), enabling him to retain his studentship, notwithstanding his neglect to enter holy orders.

* * * * *

During the summer of 1666, we are introduced to one of the turning-points in Locke's life—his first acquaintance with Lord Shaftesbury, or, as he then was, Lord Ashley. Of the chequered career or the enigmatical character of this celebrated nobleman it is no part of my task to speak. It is enough to say that, as an advocate of religious toleration and an opponent alike of sacerdotal claims in the Church and absolutist principles in the State, he appealed to Locke's warmest and deepest sympathies. The acquaintance was made through David Thomas, an Oxford physician, and the occasion of it was Lord Ashley's coming to Oxford to drink the Astrop waters. The duty of providing these waters (Astrop being a village at some distance from Oxford) seems to have been entrusted by Thomas to Locke, but, there having been some miscarriage, Locke waited on Lord Ashley to excuse the delay. "My lord," says Lady Masham, "in his wonted manner, received him very civilly, accepting his excuse with great easiness, and, when Mr. Locke would have taken his leave of him, would needs have him to stay supper with him, being much pleased with his conversation. But if my lord was pleased with the company of Mr. Locke, Mr. Locke was yet more so with that of my Lord Ashley." The result of this short and apparently accidental interview was the beginning of an intimate friendship, which seems never afterwards to have been broken, and which exercised a decisive influence on the rest of Locke's career.

On September 2 of this year broke out the Great Fire of London, which raged without intermission for three days and nights. Under the date of September 3 we find in Locke's "Register," which was afterwards published in Boyle's General History of the Air, this curious entry:—"Dim reddish sunshine. This unusual colour of the air, which, without a cloud appearing, made the sunbeams of a strange red dim light, was very remarkable. We had then heard nothing of the fire of London; but it appeared afterwards to be the smoke of London, then burning, which, driven this way by an easterly wind, caused this odd phenomenon." The Register, in which this entry is made begins on June 24, 1666, and contains, with many intermissions, the observations made by Locke, in Oxford and London, up to June 30, 1683, on the readings of the "thermoscope," the "baroscope," and the "hygroscope," together with the direction of the wind and the state of the weather. It not only affords valuable evidence of Locke's whereabouts at different times, but also shows the interest which he took in physical research.

In the early summer of 1667, Locke appears to have taken up his residence with Lord Ashley in London, and "from that time," according to Lady Masham, "he was with my Lord Ashley as a man at home, and lived in that family much esteemed, not only by my lord, but by all the friends of the family." His residence in Lord Ashley's family was, however, probably broken by occasional visits to Oxford.

To this period of Locke's life may be assigned the unpublished Essay concerning Toleration, which, with so much other valuable matter, is now for the first time accessible to the general reader in Mr. Fox-Bourne's Life. This Essay, it is not improbable, was written at the suggestion, or for the guidance of Lord Ashley, and so may have been widely circulated amongst the advocates of "toleration" and "comprehension"—words which were at that time in the mouth of every man who took any interest in religion or politics. As I shall have to speak expressly of the published Letters on Toleration, which were written about twenty years later, and which contain substantially the same views as this earlier Essay, I shall not here detain the reader further than by giving him the general conclusions at which Locke had now arrived. These may be stated summarily under three heads: first, "all speculative opinions and religious worship have a clear title to universal toleration," and in these every man may use "a perfect uncontrollable liberty, without any guilt or sin at all, provided always that it be all done sincerely and out of conscience to God, according to the best of his knowledge and persuasion;" secondly, "there are some opinions and actions which are in their natural tendency absolutely destructive to human society—as, that faith may be broken with heretics; that one is bound to broach and propagate any opinion he believes himself; and such like; and, in actions, all manner of frauds and injustice—and these the magistrate ought not to tolerate at all;" thirdly, another class of opinions and actions, inasmuch as their "influence to good or bad" depends on "the temper of the state and posture of affairs," "have a right to toleration so far only as they do not interfere with the advantages of the public, or serve any way to disturb the government." The practical result of the discussion is, that while "papists" should not "enjoy the benefit of toleration, because where they have power they think themselves bound to deny it to others," the "fanatics," as the various classes of Protestant Dissenters were then called, should be at least "tolerated," if not "comprehended" in the national Church. Indeed, as to "comprehension," Locke lays down the general principle that "your articles in speculative opinions should be few and large, and your ceremonies in worship few and easy—which is latitudinism."

This must have been one of the quietest and happiest periods of Locke's life. He seems to have been unobtrusively pursuing his studies, and gradually making the acquaintance of the great world and of public affairs through the facilities which his residence with Lord Ashley afforded him. Both his own occupations and his relations to the Ashley family appear to have been of a very miscellaneous kind. Medicine, philosophy, and politics engaged his attention by turns. To Lord Ashley and his family he was at once general adviser, doctor, and friend. In June, 1668, after consulting various other medical men, he performed on Lord Ashley a difficult operation for the purpose of removing an "imposthume in the breast," and is said thus to have saved his life. To the only child, Anthony Ashley, he acted as tutor. But, by the time the youth was seventeen, Locke was entrusted with a far more delicate business than his tuition. This was no less than finding him a wife. After other young ladies had been considered and rejected, Locke accompanied his charge on a visit to the Earl of Rutland, at Belvoir Castle, and negotiated a match with the Earl's daughter, the Lady Dorothy Manners. The match seems to have been a happy one; and Locke continued his services of general utility to the Ashley family by acting on more than one occasion as Lady Dorothy's medical attendant. On the 26th of February, 1670-71, he assisted at the birth of a son and heir, Anthony, who subsequently became third Earl of Shaftesbury, and who, as the author of the Characteristics, occupies a position of no inconsiderable importance in the history of English philosophy. It is on the evidence of this Earl of Shaftesbury that we learn the share taken by Locke in effecting the union of his father and mother. "My father was too young and inexperienced to choose a wife for himself, and my grandfather too much in business to choose one for him." The consequence was, that "all was thrown upon Mr. Locke, who being already so good a judge of men, my grandfather doubted not of his equal judgment in women. He departed from him, entrusted and sworn, as Abraham's head servant 'that ruled over all that he had,' and went into a far country 'to seek for his son a wife,' whom he as successfully found."

Though so much of Locke's time seems to have been spent on medical studies and practice, he possessed no regular qualification. In 1670 another attempt had been made, but in vain, to procure him the Doctor of Medicine's degree from the University of Oxford. Lord Ashley successfully enlisted the good services of the Duke of Ormond, the Chancellor of the University; but on learning the opposition of Dean Fell and Dr. Allestree, Locke desired his patron to withdraw the application. Both now and on the former occasion, alluded to above (p. [16]), the opposition was probably based on Locke's tendencies, known or suspected, to liberal views in religion; nor would the connexion with Lord Ashley be at all likely to mitigate the sternness of the college and university authorities. It had, of course, all along been open to him to proceed to the Doctor's degree in the ordinary way, by attending lectures and performing exercises; and whether he was prevented from doing so by the tediousness of the process, by the hope of attaining the degree through a shorter and easier method, or by a certain amount of indecision as to whether after all he would adopt the medical profession, we cannot say. Afterwards, we shall see, he proceeded to the degree of Bachelor of Medicine, but whether in the ordinary course, or by dispensation, is not known.