Book 9
39.8
Here he must drink water called the water of Forgetfulness, that he may forget all that he has been thinking of hitherto, and afterwards he drinks of another water, the water of Memory, which causes him to remember what he sees after his descent. After looking at the image which they say was made by Daedalus (it is not shown by the priests save to such as are going to visit Trophonius), having seen it, worshipped it and prayed, he proceeds to the oracle, dressed in a linen tunic, with ribbons girding it, and wearing the boots of the country.
39.9
The oracle is on the mountain, beyond the grove. Round it is a circular basement of white marble, the circumference of which is about that of the smallest threshing floor, while its height is just short of two cubits. On the basement stand spikes, which, like the cross-bars holding them together, are of bronze, while through them has been made a double door. Within the enclosure is a chasm in the earth, not natural, but artificially constructed after the most accurate masonry.
39.10
The shape of this structure is like that of a bread-oven. Its breadth across the middle one might conjecture to be about four cubits, and its depth also could not be estimated to extend to more than eight cubits. They have made no way of descent to the bottom, but when a man comes to Trophonius, they bring him a narrow, light ladder. After going down he finds a hole between the floor and the structure. Its breadth appeared to be two spans, and its height one span.
