Since I am a grandfather and since it is now X-mas, Chris, I ask for your patience. In a couple of days I will look for my account of Gen. von Moser of the Armeegruppe Arras. I can send you the Canadian trench map, a large bitmap file, if printed, it has the size of a conference table. Please, send me privately your e-mail adress, which makes me able to upload it later for you in a dropbox. I will also consult my 2010/2011 notes on this subject. I have bad memory for numbers of units, alas. So please, have some patience with me.