a small tributary stream, named fort run, joins aughwick creek at the northern end of a farmed corn field. the story of fort shirley cannot be told without elaborating on the life of its "high profile" founder, george croghan, who likely had his eye on this land as early as 1747 during his expeditions as a trader. he built a house and trading post here in 1753 after moving from the cumberland valley. weiser (1916) writes: