Mr. Prestwich has, in two valuable papers, published by the Geological Society, given a very detailed description of a raised beach and associated recent accumulations, upon the coast in the vicinity of Sangatte, a village about five miles from Calais. In the second of these papers, the author mentions that he proceeded round the headland called Cap Blanc-nez, for the purpose of ascertaining whether any traces of a similarly recent formation were to be observed in the bay of Wissant, and that his search, as far as he went, was fruitless; “but,” he adds, “owing to the extent of the dunes around Wissant, such a beach might be entirely hidden by the sands.”.