The Druids are said to be very expert in astronomy, in geography, and in all parts of mathematical knowledge; and authors speak in a very exaggerated strain of their excellence in these, and in many other sciences. Some elemental knowledge I suppose they had; but I can scarcely be persuaded that their learning was either deep or extensive. In all countries where Druidism was professed, the youth, were generally instructed by that order; and yet was there little either in the manners of the people, in their way of life, or their works of art, that demonstrates profound science or particularly mathematical skill. Britain, where their discipline was in its highest perfection, and which was therefore resorted to by the people of Gaul as an oracle in Druidical questions, was more barbarous in all other respects than Gaul itself, or than any other country then known in Europe. Those piles of rude magnificence, Stonehenge and Abury, are in vain produced in proof of their mathematical abilities. These vast structures have nothing which can be admired, but the greatness of the work; and they are not the only instances of the great things which the mere labor of many hands united, and persevering in their purpose, may accomplish with very little help from mechanics. This may be evinced by the immense buildings and the low state of the sciences among the original Peruvians. The Druids were eminent above all the philosophic lawgivers of antiquity for their care in impressing the doctrine of the soul's immortality on the minds of their people, as an operative and leading principle. This doctrine was inculcated on the scheme of Transmigration, which some imagine them to have derived from Pythagoras. But it is by no means necessary to resort to any particular teacher for an opinion which owes its birth to the weak struggles of unenlightened reason, and to mistakes natural to the human mind. The idea of the soul's immortality is indeed ancient, universal, and in a manner inherent in our nature; but it is not easy for a rude people to conceive any other mode of existence than one similar to what they had experienced in life, nor any other world as the scene of such an existence but this we inhabit, beyond the bounds of which the mind extends itself with great difficulty. Admiration, indeed, was able to exalt to heaven a few selected heroes: it did not seem absurd that those who in their mortal state had distinguished themselves as superior and overruling spirits should after death ascend to that sphere which influences and governs everything below, or that the proper abode of beings at once so illustrious and permanent should be in that part of Nature in which they had always observed the greatest splendor and the least mutation. But on ordinary occasions it was natural some should imagine that the dead retired into a remote country, separated from the living by seas or mountains. It was natural that some should