"I haven't checked in on this thread of late....but what am i missing? has the DA bunker's construction time frame been resolved? do we know who was responsible for it's addition?"
Paul:
Not yet, even if some evidence has been recently found and explained that might point to a particular timespan and person. But basically the over-all timeline is this:
1. If some real visual evidence of the conception and/or appearance of the DA predates Jan. 1918 it is fairly certain the conception and creation of the DA would be Crump.
2. If the foregoing occured after that date the list of potential candidates would necessarily grow.
However, some things on this thread should be clarified and altered for the sake of accuracy, at this point anyway. An example of that is this remark on Post #69 from Tom MacWood which is the entire extent of that post:
He said:
"CH Alison is responsible for the bunker, and a number of other changes."
That might look to some casual observer and reader as a statement of fact; it isn't, at least part of it isn't. It is merely conjecture and speculation regarding the conception and creation of the DA. It is true and provable that Alison was responsible for a number of other changes to Pine Valley but it is not provable, at this point, that he was responsible for the DA.