In 1668 Locke was elected a Fellow of the Royal Society, and in 1669 and 1672 was placed on the Council, but he never appears to have taken much part in the proceedings of the society. On the other hand, there seem to have been certain less formal meetings of a few friends, constituting possibly a sort of club, in the discussions of which he took a more active share. It was at one of these meetings that the conversation took place which led to Locke's writing his famous _Essay_ (see page 127). According to a marginal note made by Sir James Tyrrell in his copy of the first edition, now in the British Museum, the discussion on this occasion turned on "the principles of morality and revealed religion." The date of this memorable meeting was, according to the same authority, the winter of 1673; but according to Lady Masham, it was 1670 or 1671. Any way, there is an entry on the main subject of the _Essay_ in Locke's Common-place Book, beginning "Sic cogitavit de intellectu humano Johannes Locke, anno 1671." In this brief entry the origin of all knowledge is referred to sense, and "sensible qualities" are stated to be "the simplest ideas we have, and the first object of our understanding"--a theory which, as we shall hereafter see, was supplemented in the _Essay_ by the addition to the ultimate sources of knowledge of simple ideas of reflection. The _Essay_ itself was not published till nearly twenty years after this date, in 1690. Locke's health had never been strong, and, in the years 1670-72 he seems to have suffered much from a troublesome cough, indicative of disease of the lungs. Connected with this illness was a short journey which he made in France, in the suite of the Countess of Northumberland, in the autumn of 1672. Soon after his return, his patron, who had lately been created Earl of Shaftesbury, was appointed to the highest office of the State, the Lord High Chancellorship of England. Locke shared in his good fortune, and was made Secretary of Presentations--that is, of the Chancellor's church patronage--with a salary of 300_l._ a year. The modern reader, especially when he recollects Locke's intimacy with Shaftesbury, is surprised to find that he dined at the Steward's table, that he was expected to attend prayers three times a day, and that, when the Chancellor drove out in state, he was accustomed, with the other secretaries, to walk by the side of the coach, while, as "my lord" got in and out, he "went before him bareheaded." The distinctions of rank were, however, far more marked in those days than at present, and the high officers of state were still surrounded with much of the elaborate ceremonial which had obtained in the times of the Tudors.