Working across at M[a]cAdam (only one of the five uses "McAdam"): What is the 5/5/ for? When the horizontal McAdam intersects with the vertical McAdam, what is the 7.7 for? Is 1540 AD the date of the common ancestor for all five lines of MacAdam? That would make sense. I was guessing it was in the 1600s or a bit earlier. What is the 15.15 and 28 at the end? Thanks, Allene