Along the southern tier of counties a thin line of settlements stretched westward to Pittsburgh, reaching the upper waters of the Ohio while the colony was still under the Penn family.

沿着县的南部， 一排细长的定居点向西延伸到匹兹堡，到达俄亥俄河的上游水域， 而该殖民地仍在宾夕法尼亚家族的统治下。