《徐霞客游记·滇游日记四十三》
上走不怎么陡峻，但屡次走过坑谷相夹的山脊，三里，从山脊上向西望望城关，只隔着一条峡谷。
上不甚峻，而屡过夹坑之脊，三里，从脊上西望望城关，只隔一峡也。
It was not too difficult to walk uphill, but the journey included many mountain ridges flanked by valleys, and after three li, I looked westwards from the mountain ridge and saw only a gorge away from the pass.