From Andy Cowan, to Margie Cowan, dated 27 Nov 2006
Jane White McPherson Cowan, wife of Charles Cowan of Lebanon Ohio...was born in Bourbon County, KY where her father Adam had settled in 1785....one of the boundaries of his land lay along the land of William Cowan...William Cowan sold a part of his 1000 acres to Alexander Breckenridge in 1790. The deed reads "William Cowan of the County of Greene and the State of North Carolina and his wife, Jane.....". Greene County later became part of the State of Tennessee. The William Cowan land deeded to Breckenridge is described as beginning at a corner to David Gass. David Gass' mother may have been a Margaret Cowan, married to John Gass in Lancaster, PA
Andy's note to Margie suggests that after the Revolution, William Cowan considered resettling in Kentucky. He probably intended to take advantage of land warrants obtained from the State of Virginia for his Revolutionary War era service. The nearby presence of David Gass is significant (as Andy notes in his full email) because Gass had also been a settler in Castles' Woods. That Gass is known to have gone to Kentucky with Boone in the first wave of settlement in 1775. This by itself tends to confirm that this particular William Cowan is in fact the William Cowan of Castle's Woods.
Andy also observes that Gass' mother may have been Margaret Cowan, married to John Gass in Lancaster County. What this is based on is not apparent, but if true, probably indicates that Gass and William Cowan were brother's inlaw, and may point to an approach for identifying William's parents.