So this is a bit of a guess, but I think the buildings just barely visible through the top hole of the fence post may be the Henry Spangler Farm. So based on that (which may be wrong) I think this fence extends west from Emmitsburg Road somewhere a bit south of the location of the Rodgers House. I'v got to admit that this is a tough one, especially since I have not had much chance to get onto the filed of late.