《徐霞客游记·滇游日记三十五》
三里，越过一座最高的山岭，于是屡上屡下，屡次上登山脊，多次越过山坳，都是从深密的林木中走。
三里，逾一最高之岭，乃屡上屡下，屡脊屡坳，皆从密箐中行。
Three li, over the highest mountain ridge, then repeatedly climbing, repeatedly climbing up the ridge, and repeatedly crossing the mountain pass, all walking through dense forests.