《徐霞客游记·滇游日记四十三》
平缓向北穿越山坳一里，山脊南面的山著，仍然向西下坠。
平透坳北一里，其脊南之菁，犹西坠也。
I walked gently north through the mountain pass for one Chinese mile, and the mountain ridge on the south side of the mountain still descended westward.