simonrail uploaded a similar(identical?) John Owen pic
[photo]90363[/photo]
(to your subbrit link) onto AN for Ayle from July '68, it's quite possible that one of the two corrugated sheds to the left could be the outside of Harry's photo. Les doesn't recognise it from any PDHMS trip he was on and it doesn't look too much like anything relating to Clarghyll on AN, but oldpitman knows Ayle and doesn't recall a similar bit of processing plant although perhaps the other two sites he mentioned are possibles.
Given that the brave folk at PDHMS have thousands(?) of Harry's photos to archive I suspect there has been some hair-tearing times, Dave Williams sent me about two hundred a year ago, so far I have still have about 50 that I can put little or no information to.
If nothing else it's quite fun as every now and then something connects and another two or three get pinned down and it does help keep me occupied!;(
Then I've still got 50/100 of my Dad's to try and get more information on, he could be even more cunning than Harry not only did he often not annotate his slides, some of those he did were attributed to the wrong place, luckily eagle-eyed people on AN have quickly put me right.