Only jst returned to the thread and noticed the mention of 'John Collier, John Collier, the window to watch.' As i have mentioned on here, during my 3rd tour of Ulster i was on the Regimental Intelligence Section (no sniggering at the back) as photographer/collator. One of the photos i took was of a John Collier department in mid explosion. And, believe it or not, in the snap you can clearly make out a single pane of glass blown in it's entirety from the framework. The window to watch, indeed :-)