Interesting. I’ve received not one comment regarding the misspelling of McDowell’s name on his headstone.
A note regarding the Union OOB: I can’t find any documentation of the existence of a Union Army of Northeastern Virginia. This is the name typically used for McDowell’s army at Bull Run. The Department of Northeastern Virginia was created on 5/28/1861 from part of the Department of the East with boundaries enclosing Virginia east of the Allegheny Mountains and north of the James River with the exception of a sixty mile radius around Fort Monroe. It was commanded by McDowell until 7/25/1861 when it was attached to the Military Division of the Potomac; it was merged with the Department of the Potomac on 8/17/1861 (see Eicher and Eicher, Civil War High Commands, p 837). But none of the reports or correspondence from First Bull Run reference an Army of Northeastern Virginia – instead they refer to the Department or simply “McDowell’s Corps.” The moniker appears to be an after the fact creation, and that is the story I’m sticking with unless you can prove otherwise!