《徐霞客游记·游嵩山日记》
溯流上到寺后，峡谷底部陡崖矗立，如半圆环绕，上部倾覆，下部凹削。
溯流造寺后，峡底矗崖，环如半规即半圆，上覆下削。
Going up the stream to the back of the temple, there were steep cliffs standing at the foot of the canyon, like a semi-circle with the upper part inclined and the lower part concave.