 That sight is as fresh in my memory after an interval of 57 years as if I had seen it yesterday . The natural surfaces of the rock were irregular in the highest degree . Worn , broken , and battered by the unnumbered ages of the most tremendous surf , and by the splitting of the rock along lines of natural fissures , there did not seem to be one square foot of rock which was even tolerably level . Yet in the midst of this torn and fissured surface we suddenly came on a magnificent circular floor , 42 ft in diameter , as level as water , and as smooth as a billiard table . 
