Harvey still retained his Lumleian lectureship, the duties of which he conscientiously discharged to the last. His life, says Dr. Munk, already prolonged beyond the span allotted to man, and his waning powers yet further broken by repeated and severe attacks of illness, warned him of his approaching end. He had lived to see his grand discovery of the circulation of the blood universally accepted and inculcated as a canon in most of the medical schools of Europe; and he is said by Hobbes to have been "the only one that conquered envy in his lifetime and saw his new doctrine everywhere established." Harvey now prepared for the great change awaiting him, and on July 28, 1656, resigned his lectureship, took his leave of the College, and in so doing manifested the same zeal for its prosperity as had marked the whole of his former life. On this occasion he put the crowning act to his munificence by giving to the College in perpetuity his patrimonial estate at Burmarsh in Kent, then valued at £56 a year. The particular purposes of this donation were the institution of an annual feast, at which a Latin oration should be spoken in commemoration of the benefactors of the College, a gratuity for the orator, and a provision for the keeper of his library and museum. All this attention to perpetuate a spirit of concord and social friendship among his brethren, was in full accordance with Harvey's benevolent and liberal sentiments.
The last of his letters which has been preserved is addressed to John Vlackveld, physician at Haarlem, who had sent him an interesting specimen. The letter is a characteristic one. It runs:--
"LEARNED SIR,--Your much esteemed letter reached me safely, in which you not only exhibit your kind consideration of me, but display a singular zeal in the cultivation of our art.
"It is even so. Nature is nowhere accustomed more openly to display her secret mysteries than in cases where she shows traces of her workings apart from the beaten path; nor is there any better way to advance the proper practice of medicine than to give our minds to the discovery of the usual law of nature, by careful investigation of cases of rarer forms of disease. For it has been found in almost all things, that what they contain of useful or of applicable, is hardly perceived unless we are deprived of them, or they become deranged in some way. The case of the plasterer to which you refer is indeed a curious one and might supply a text for a lengthened commentary by way of illustration. But it is in vain that you apply the spur to urge me, at my present age, not mature merely but declining, to gird myself for any new investigation; for I now consider myself entitled to my discharge from duty. It will, however, always be a pleasant sight to see distinguished men like yourself engaged in this honourable arena. Farewell, most learned sir, and whatever you do, still love