《明史·列传·卷一百一十》
辽阳镇以东二百余里以前有个孤山堡，巡抚御史张铎又增设了险山五堡，却与辽镇缺乏声援之势。
辽阳镇东二百余里旧有孤山堡，巡按御史张铎增置险山五堡，然与辽镇声援不接。
More than 200 miles east of Liaoyang Town, there used to be a Gushan Fort, and Zhang Duo, the governor and inspector, had established five more forts in the Wuyanshan Mountains, but they lacked support from the Liaoning garrison.