to hold up the wisdom of one age to the scorn of another. There are two cautions which are needed in all ages; the first, that eminence in one department of human learning does not, of itself, constitute a qualification to pass authoritative judgments in other departments; the second, that as all knowledge, when unhindered, is progressive the present generation may indeed hope to have got somewhat nearer the truth than its predecessors, but in virtue of the same principle it is still far from its final stage. Archæology which at the beginning of the nineteenth century could hardly claim to be regarded as a science, had by the end of that century attained to the highest rank as a science. It has not outlived the record of past mistakes and some years may yet have to elapse before its achievements are fully recognised. It is impossible to discuss the Christianity of Cornwall in its earlier stages without devoting some space to its Celtic inhabitants. This is all the more necessary because in the county there are many monuments, both pagan and Christian, and in some quarters there has been a disposition to confound them. Only by referring the pagan monuments to their true place in pre-history is it possible to avoid this confusion. For such knowledge as he possesses of archæology the writer is largely indebted to M. Joseph Déchelette’s _Manuel d’Archéologie_. There is no work in English which, based on sound principles, attempts, as this does, to cover the whole ground. Like the _Principles of Geology_ the _Manuel_ stands alone. When the losses in human life, due to the Great War, come to be reckoned up and those losses come to be analysed, there will be few names to take precedence of that of M. Déchelette. The _Revue Celtique_, after expressing its profound regret for his death, says that after honouring France by solid and learned works, notably by his _Manuel d’Archéologie_—a unique monument of erudition—at the age of fifty-three, though not compelled to serve in the army, he chose to take part in the campaign and to die like a hero. An order of the day of the French army supplies particulars of his death. He was a captain in the 29th Regiment of infantry and was shot down while leading his company. With his men he had won 800 metres of ground. As he lay dying he asked his colonel whether they had kept the conquered ground, and being answered in the affirmative, he replied that he was happy that his death was of service to France. The writer finely adds, _Belle vie, et fin plus belle encore_.