Adrian Weale posts quite frequently, or used to, at the message board at
www.feldgrau.net - this was the board for
www.feldgrau.comYou could probably ask him, but if it wasn't mentioned in the book (an excellent book, I hope you read the recently updated version, I've only seen the original version several years ago) it may be that his research didn't uncover the answer.
But you never know. I'd be interested in what you find out.
I'd be careful with the SS rank designations also - Sturmann and Rottenführer were not NCO ranks, they were simply pay grades for Private soldiers, so these two Canadians would not have been in command of troops the way a Canadian Corporal would have been. In the SS, you weren't considered a true NCO until you wore tress on your shoulder and collar - ie attained the rank of SS-Unterscharführer. The stripes on the sleeves of a Sturmann or Rottenführer were roughly equivalent to a modern day private (trained) and corporal in the Canadian Forces - ie a private with a pay raise who did not yet have the training or experience to command troops. The difference being that the CF calls a corporal an NCO whereas in the SS, you would have had to be what we call a Sergeant before being so considered.