It was about this time, that is in the sixth century, that a great change came over the surroundings of the two rocks. Hitherto, they had formed rocky excrescences at the edge of the low forest-land by which the country adjoining the sea was covered. Gradually the sea commenced a steady encroachment. It had been probably in progress even since Roman times, but its advance became more rapid, and after an earthquake, which occurred in the year 709, the whole of the forest of Scissey was invaded, and the remains of the trees were buried under a great layer of sand. There were several villages in this piece of country, some of whose names have been preserved, and these suffered complete destruction with the forest. A thousand years afterwards, following a great storm and a consequent movement of the sand, a large number of oaks and considerable traces of the little village St Etienne de Paluel were laid bare. The foundations of houses, a well, and the font of a church were among the discoveries made. Just about the time of the innundation, we come to the interesting story of the holy-minded St Aubert who had been made bishop of Avranches. He could see the rock as it may be seen to-day, although at that time it was crowned with no buildings visible at any distance, and the loneliness of the spot seems to have attracted him to retire thither for prayer and meditation. He eventually raised upon the rock a small chapel which he dedicated to Michel the archangel. After this time, all the earlier names disappeared and the island was always known as Mont St Michel. Replacing the hermits of Mandane with twelve canons, the establishment grew and became prosperous. That this was so, must be attributed largely to the astonishing miracles which were supposed to have taken place in connection with the building of the chapel. Two great rocks near the top of the mount, which were much in the way of the builders, were removed and sent thundering down the rocky precipice by the pressure of a child's foot when all the efforts of the men to induce the rock to move had been unavailing. The huge rock so displaced is now crowned by the tiny chapel of St Aubert. The offerings brought by the numerous pilgrims to Mont St Michel gave the canons sufficient means to commence the building of an abbey, and the unique position of the rock soon made it a refuge for the Franks of the western parts of Neustria when the fierce Norman pirates were harrying the country. In this way the village of Mont St Michel made its appearance at the foot of the rock. The contact of the canons with this new population brought some trouble in its wake. The holy men became contaminated with the world, and Richard, Duke of Normandy, replaced them by thirty Benedictines brought from Mont-Cassin. These monks were given the power of electing their own abbot who was invested with the most entire control over all the affairs of the people who dwelt upon the rock.