Shawn: While I've only been doing this for about a year now, and while there are LOT'S of folks in the "McG" community (1R AND 2R) who know a WHOLE lot more about all this than I ever will, I think you have a REAL find here. First, it is the 1st documented VA tie in I know of, even tho at least among the NE and W GA Mc1Rs there is recurring (but I THINK UNdocumented) ref to the Mc1R's having come initially come into the country thru what we up here call "VuhGINyuh". 2d, the names, dates, and general area of the country are so similar to the generally accepted"Patrick-and Martha-McG-come-to Cecil-Cty-MD, and-have-2-sons (Wm and John) in-the-1740s-who-both-go-to-SC-during-the-Rev-War" story that it seems to me at least that there almost has to be a tie-in. Could be that they were the same family, and that some just went to Cecil Cty after spending a few years years in Surry Cty. Could be some other connection--or no connection between the two families at all.
Anyway, this is all new and very interesting to ME, so I'll just add my thanks to you for finding this and getting it on the air. I hope you'll let us know if you find out more. I am going to now try do a little more VA-checking on my own--as a pretty busy summer work sched permits. I also hope, tho, that your posting smokes out some response/comment from the McG community --including from the many long-time McG (1 and 2R) experts out there. Both McG sites have been pretty quiet for a while, you know.
Again, thanks--and regards from Northern VA. BobMcG