"Our Dialogue now became extremely brisk. The King quickened into extraordinary vivacity; and examined me now in the character of Doctor, with such a stringency as, in the year 1751, at Gottingen, when I stood for my Degree, the learned Professors Haller, Richter, Segner and Brendel (for which Heaven recompense them!) never dreamed of! All inflammatory fevers, and the most important of the slow diseases, the King mustered with me, in their order. He asked me, How and whereby I recognized each of these diseases; how and whereby distinguished them from the approximate maladies; what my procedure was in simple and in complicated cases; and how I cured all those disorders? On the varieties, the accidents, the mode of treatment, of small-pox especially, the King inquired with peculiar strictness;--and spoke, with much emotion, of that young Prince of his House who was carried off, some years ago, by that disorder--[suddenly arrested by it, while on march with his regiment, "near Ruppin, 26th May, 1767." This is the Prince Henri, junior Brother of the subsequent King, Friedrich Wilhelm II., who, among other fooleries, invaded France, in 1792, with such success. Both Henri and he, as boys, used to be familiar to us in the final winters of the late War. Poor Henri had died at the age of nineteen,--as yet all brightness, amiability and nothing else: Friedrich sent an ELOGE of him to his ACADEMIE, [In _OEuvres de Frederic,_ vii. 37 et seq.] which is touchingly and strangely filled with authentic sorrow for this young Nephew of his, but otherwise empty,--a mere bottle of sighs and tears]. Then he came upon Inoculation; went along over an incredible multitude of other medical subjects. Into all he threw masterly glances; spoke of all with the soundest [all in superlative] knowledge of the matter, and with no less penetration than liveliness and sense. "With heartfelt satisfaction, and with the freest soul, I made my answers to his Majesty. It is true, he potently supported and encouraged me. Ever and anon his Majesty was saying to me: 'That is very good;--that is excellently thought and expressed;--your mode of proceeding, altogether, pleases me very well;--I rejoice to see how much our ways of thinking correspond.' Often, too, he had the graciousness to add: 'But, I weary you with my many questions!' His scientific questions I answered with simplicity, clearness and brevity; and could not forbear sometimes expressing my astonishment at the deep and conclusive (TIEFEN UND FRAPPANTEN) medical insights and judgments of the King.