Has anyone seen the Hindenburg Line?

I was back at work today, and it was just as though I'd never left. Before Christmas a historian from the Department in Canberra flew down to sit by my side and watch as I pushed and nudged WW1 front lines about on maps until he was satisfied with their accuracy. Today it became clear I had three towns in the wrong places, and some (but not all) of my lines needed to go just an umph north and a wheeze west. We had one map too many, with the Germans actually arriving before they had set off. It also appears that everyone who has ever drawn a map with the "HIndenburg LIne" on it, has put it wherever they damn well please. We have followed this convention.