He reached Chauvigny, where was a ford, but this was now found impracticable. On the left hand of the present road to Lussac-le- Chateau is a stony, narrow, waterless valley, up which formerly ran the old Roman highway. At the 21/2 kilometre stone is a dense thicket of oak coppice, clothing the steep side of the valley. By scrambling down this, clinging to the oak-branches, one reaches a bluff of chalk rock, hollowed out by Nature at the foot to the depth of 10 feet, and running horizontally to the length of from 32 to 34 feet, and terminating in a natural barrier of rock. It contracts in one place so as to form two chambers. Now this gallery is closed towards the valley by a screen of six huge slabs 8 and 9 feet long, 8 and 9 feet high, and 4 feet thick. They have apparently been slung down from above, and caught and planted so as to wall up the open side of the recess. And at the north end another block, now broken, was set at right angles so as to half close the gallery at the end, leaving a doorway for access to the interior. The attempt to plant these huge slabs on a steep slope was not in every case successful, for a couple slid down the incline, but these served to form a heel-catch to those who did remain erect. Local antiquaries pronounce this to be a fortified cave, unique of its kind, devised to protect the road to Lussac, at the strategical point where it could best be defended. I have myself no manner of doubt that it was a so- called demi-dolmen, a tribal ossuary of neolithic man. Not only is it quite in character with his megalithic remains scattered over the country, but treasure-seekers who in digging displaced and brought down one of the side slabs found two diorite axes, one of which I was fortunate enough to secure. Persons in Gaulish or post-Roman times would not have dreamed of going to the enormous labour and attempting the difficult task of forming the sides with stone slabs, but would have closed the recess with a wall. The cave goes by the name of La Grotte de Jioux (of Jove) which in itself hints its remote antiquity. [Illustration: THE RUINED MONASTERY IN THE ROCKS, NOTTINGHAM PARK. The monastery commonly called Papists' Holes, abandoned at the Dissolution, was finally wrecked by the Roundheads in the Civil Wars.]