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People: Theodoric Strabo

...the mouth of Redstone Creek on the …

Years: 1749 - 1749
...the mouth of Redstone Creek on the Monongahela River (a tributary of the Ohio River) which will later become Redstone Old Fort and even later Brownsville, Pennsylvania.

Maryland's land grant ends at the crest of the Appalachian mountains, but both Pennsylvania and Virginia claim their land grants continued westward, so the land claimed by Cresap and his traders west of the Appalachians will ultimately became part of upper West Virginia and western Pennsylvania.