And Hume's motions seem to have partaken of the pomp and regularity of his official station; for, even in these familiar letters to his brother, he is all along the secretary of legation; or when he descends from that height, it is but to mount the chair of the scholar and philosopher. There are no escapades. We never hear that he has taken it in his head to diverge from the regular route to see an old castle or a waterfall. Yet he went with an eye for scenery. The Alpine passes excited his admiration, and his description of the banks of the Rhine will be recognised at this day as very accurate--with one material exception. He says nothing of the feudal fortresses perched like the nests of birds of prey, to which their moral resemblance was at least as close as their physical; and thus one of the greatest historians of his age, passes through a country without appearing to have noticed in their true character, this series of prominent marks of a remarkable chapter in the history of Europe. He speaks of them simply as "palaces"--a word not designative of the character of the buildings, or in any way evincing that their historical position had occurred to his mind. But it must be admitted, that later tourists on the Rhine have amply made up for his silence on these matters. He does not condescend to mention any one of the fine specimens of Gothic architecture which he must have seen--not even that vast and beautiful fragment the cathedral of Cologne. One wonders whether or not he was at the trouble of inquiring, what was that huge mass which he must have seen towering over the city; and if, straying within its gates, and looking on Albert Durer's painted windows, he had curiosity enough to inspect the reliquary of the tomb of the three kings, containing gems so ancient, that they are conjectured to be older than Christianity, and to have been the ornaments of some Pagan shrine, transferred to and historically associated with the pure creed which displaced the barbarous rites of Paganism. This might have at least formed a curious topic for his Natural History of Religion. But on this as on many other subjects, he would sympathize with La Bruyere when he speaks of "L'ordre Gothique, que la barbarie avoit introduit pour les palais et pour les temples;" and his thorough neglect of both the baronial and ecclesiastical architecture of the middle ages, is characteristic of a mind which could find nothing worthy of admiration, in the time which elapsed between the extinction of ancient classical literature, and the rise of the arts and sciences in modern Europe.