《水经注·卷三十三》
唯有马岭只是稍稍有点绵延曲折，但也凿山筑路，羊肠小道七转八弯，然后才能上去。
西南临大江，窥之眩目。惟马岭小差委迤。犹斩山为路，羊肠数四，然后得上。
Only Maling is slightly curved and tortuous, but the mountain is chiselled and built into a road, and there are seven or eight bends in the sheep intestine path, and then it can be climbed.