《明史·列传·卷一百四十七》
于是讨论在登、莱设立巡抚，像天津一样，由陶朗先充任；而山海关特设经略一人，管辖一方，统一事权。
于是登、莱议设巡抚如天津，以陶朗先为之；而山海特设经略，节制三方，一事权。
So it was discussed to establish a governor in Deng and Lai, like in Tianjin, with Tao Langxian as the first governor; and Shanhaiguan was specially established as a commander, who would have jurisdiction over one side and unify the authority.