Note 2525 — THE CONFIGURATION OF THE COAST OF KENT IN THE TIME OF CAESAR
Reading edition
According to M. Léon Lejeal, the author of an interesting article on ‘Le littoral’ in Boulogne-sur-mer et la région boulonnaise (i, 365), ‘certains hydrographes affirment qu’au Grisnez, la falaise s’entame de 0,25 centimètres par an.’ I presume that this was the authority upon which M. de St.-Martin relied.