 By the late 1710s, rumors had begun to reach the Pennsylvania Assembly that Maryland was planning to establish settlements in the disputed area near the river.In response, Pennsylvania attempted to bolster its claim to the territory by organizing a proprietorial manor along the Codorus Creek, just west of the river, in 1722.This action prompted a crisis in relations between the two colonies, leading to a royal proclamation in 1724 which prohibited both colonies from establishing new settlements in the area until a boundary had been surveyed.