I have the Atlas, the map is not particularly detailed in the area in question; more to the point, do you know where the map was derived from? How do you know it is accurate?
Looking at the text I see where you have taken your opinions on the matter from. I might have known it.
I treat Elting's opinion of Macdonald with the contempt it deserves: by now I know a lot more about Macdonald than he did and certainly more than you do.