Fortified inclosures have been described in Belgium. We are told, “They are generally established on points overhanging valleys, on a mass of rocks forming a kind of headland, which is united to the rest of the country by a narrow neck of land. A wide ditch was dug across this narrow tongue of land, and the whole camp was surrounded by a thick wall of stone, simply piled one upon another, without either mortar or cement.” “One of these walls, when described, was ten feet thick, and the same in height.” These intrenched positions were so well chosen that most of them continued to be occupied during the ages which followed. The Romans occasionally utilized them for their camps. Over the whole inclosure of these ancient camps worked flints and remains of pottery have been found.13 These fortified places have been well studied in the south of England. What is known as the South-Downs in Sussex is a range of hills of a general height of seven hundred feet. This section is about five miles wide and fifty miles long. Four rivers flow through these downs to the sea. In olden times their lower courses must have been deep inlets of the sea, thus dividing those hills into five groups, each separated from the other by a wide extent of water and marsh land. To the north of these hills was a vast expanse of densely wooded country. It is not strange, then, to find traces of numerous settlements among these hills. As the surface soil is very thin, old embankments can still be traced. The cut given is a representation of Cissbury, one of the largest of these camps. It incloses nearly sixty acres. The rampart varies according to the slope of the hill. Where the ascent was at all easy it was made double. Fortified camps are very numerous throughout the hill country. They vary, of course, in size, but the situation was always well chosen.14