I'm glad this has recently been commented on because I too missed it on the first go-round. I can't see how that is even POSSIBLE, but I don't recall reading any of this at any earlier time, and I haven't left any indications of an earlier presence.
Simon, have you and the family has a chance to visit Vancouver BC or Victoria?
I Vancouver, though it has been quite a while since I've been there. It is a great metropolis! Victoria, on the other hand, is more like a carefully preserved artifact of Old Canada - still delightful, but in a totally different way.
If you drive to Victoria - which involves a ferry crossing - then you can drive into the northern reaches of Vancouver Island and quickly see how underpopulated it is. The island's west coast is wild and undeveloped and the east coast only very slightly more populated. Top off your petrol at EVERY opportunity, and do not expect civilization to be close-at-hand.
By the way, I was unable to get Part One to show itself. Certainly your story should be in the JWN permanent archives.