Dr. Rigollot, who had been for ten years one of the most decided opponents of the opinions of Boucher de Perthes, actually himself discovered in 1854 some wrought flints in the quaternary deposits at Saint Acheul, near Amiens, and it was not long before he took his stand under the banner of the Abbeville archæologist. The _fauna_ of the Amiens deposits is similar to that of the Abbeville beds. The lower deposits of gravel, in which the wrought flints are met with, have been formed by fresh water, and have not undergone either alteration or disturbance. The flints wrought by the hand of man which have been found in them, have in all probability lain there since the epoch of the formation of these deposits--an epoch a little later than the diluvial period. The number of wrought flints which have been taken out of the Abbeville beds is really immense. At Menchecourt, in twenty years, about 100 well-characterised hatchets have been collected; at Saint Gilles twenty very rough, and as many well-made ones; at Moulin-Quignon 150 to 200 well-formed hatchets. Similar relics of primitive industry have been found also in other localities. In 1853, M. Noulet discovered some in the Infernat Valley (Haute-Garonne); in 1858, the English geologists, Messrs. Prestwich, Falconer, Pengelly, &c., also found some in the lower strata of the Baumann cavern in the Hartz. To the English geologists whose names we have just mentioned must be attributed the merit of having been the first to bring before the scientific world the due value of the labours of Boucher de Perthes, who had as yet been unsuccessful in obtaining any acceptation of his ideas in France. Dr. Falconer, Vice-president of the Geological Society in London, visited the department of the Somme, in order to study the beds and the objects found in them. After him, Messrs. Prestwich and Evans came three times to Abbeville in the year 1859. They all brought back to England a full conviction of the antiquity and intact state of the beds explored, and also of the existence of man before the deluge of the quaternary epoch. In another journey, made in company with Messrs. Flower, Mylne, and Godwin Austen, Messrs. Prestwich, Falconer, and Evans were present at the digging out of human bones and flint hatchets from the quarries of St. Acheul. Lastly, Sir C. Lyell visited the spot, and the English geologist, who, up to that time, had opposed the idea of the existence of antediluvian man, was able to say, _Veni, vidi, victus fui!_ At the meeting of the British Association, at Aberdeen, September the 15th, 1855, Sir C. Lyell declared himself to be in favour of the existence of quaternary man; and this declaration, made by the President of the Geological Society of London, added considerable weight to the new ideas. M. Hébert, Professor of Geology at the Sorbonne, next took his stand under the same banner.