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Rh which it is not necessary to enter, these discoveries were regarded with distrust in France, and were very far from being generally accepted by the geologists and antiquaries of that country.

In the autumn of 1858, however, that distinguished palæontologist, the late Dr. Hugh Falconer, F.R.S., visited Abbeville, in order to see M. Boucher de Perthes's collection, and became "satisfied that there was a great deal of fair presumptive evidence in favour of many of his speculations regarding the remote antiquity of these industrial objects, and their association with animals now extinct." Acting on Dr. Falconer's suggestion, the late Sir Joseph Prestwich, F.R.S,, whose extensive and accurate researches had placed him in the first rank of English geologists, visited Abbeville and Amiens, in April, 1859; where I, on his invitation, had the good fortune to join him. We examined the local collections of flint implements and the beds in which they were said to have been found; and, in addition to being perfectly satisfied with the evidence adduced as to the nature of the discoveries, we had the crowning satisfaction of seeing one of the worked flints still in situ in its undisturbed matrix of gravel, at a depth of 17 feet from the original surface of the ground.

I may add that on March 26th, 1875, I dug out from the gravel, in a pit close to the seminary at Saint Acheul, a pointed implement at a depth of 10 feet 10 inches from the surface.

From the day on which Sir Joseph Prestwich gave an account to the Royal Society, of the results of his visit to the Valley of the Somme, the authenticity of the discoveries of M. Boucher de Perthes and Dr. Rigollot was established; and they were almost immediately followed by numerous others of the same character, both in France and England.

Before proceeding to describe the discoveries made in this country, it will be well to say a few words as to some others of those which have been made on the continent of Europe. In France such discoveries have been so abundant that it would be an almost hopeless task to enumerate the whole of them, I must, therefore, content myself by calling attention to a few only; and, moreover, shall not overburden my pages with references. One of the earliest discoveries was made by M. Vincent at Troyes (Aube), where, in 1850, at a depth of 3 metres, he found an