"The entrances are, so to speak, in the ditch of the road to Azay. The most practicable of them, and that by which M. Antoine and I penetrated, is the easternmost of the three, and is marked A on the plan, and it gives access to a small triangular chamber C; but the entrance is so low that one can only enter on one's knees or in a doubled position. Further on it is loftier. On advancing to the end one leaves on the right a sort of staircase B cut in the rock, but very worn, which formerly ascended spirally to the upper cave, but is now without issue. [Illustration: Plan of the Refuge of Château Robin (Indre et Loire).] "At the bottom of the chamber C a very narrow passage turns at a right angle and gives access to a large hall E that is sustained by a pillar F. This pillar is three feet square and the vaulted chamber may be 15 to 18 feet square and 5 feet high. On the left a great pier G allows of two passages I I which lead to the other openings that gape upon the road, and turning to the right give access to the further depths of the underground retreat. A passage H is, however, the most direct means of communication between the cavern E and the larger hall J to which also access is obtained through the openings I I separated by the pillar S. "The cavern J, the largest of all, is 25 feet long by 15 feet wide at the one end and 24 feet at the other. It is supported by the pillar K, shaped to suit the widening of the hall. At the bottom of this chamber is a staircase L descending from the floor and without any breastwork to protect it, and therefore dangerous, as it goes down 6 feet, and is but about a foot and a half wide. This staircase is 12 feet long, and the passage M that is a continuation of it is hardly more than 4 feet high at the entrance, and is nearly 20 feet long, so that one has to creep along it, bent double, assisted by one's hands.