My visit to the National Archives in Edinburgh drew a blank. All the interestingly named items in-house were just the same old ordnance survey maps with some coloured boundary lines showing who owned some small piece of land at a particular instance.
I have never found an old Ordnance Survey map (or revision) that has indicated any structure around the Blue Pool. It’s hard to believe that this is an accidental omission.
There are other items that I will view on my next visit but they have to be ordered in advance as they are not kept in-house.
I visited the Blue Pool about three weeks ago with my scrubbing brush. After a few minutes the water was totally cloudy and I spent the next few hours guessing where the weed might be.
The water took a week to clear properly and I realised that saying, “You missed a bit”, was a gross understatement.
I was armed with my scrubbing brush of course but before I got started I took some photographs.
I found a new 6 inch clay pipe (with spigot end) poking through the wall but not at right angles to the tangent of the circumference (it was a bit squint). It was pointing pretty much along the same line as the pylons towards the long straight path from Torwood to Denovan.
Another find, just above the bottom debris, was a 12 inch length of 1.5 inch iron pipe sticking out horizontally from the wall and pointing over to the brick arch. This iron pipe appears to line up with the manhole. The end of the pipe has been cut at a deliberate angle of about 30 degrees to the horizontal — the photo quality is very poor.
The extension rod that used to stick up from the manhole has vanished.
The water surface was calm and made for some good photos but, on long zoom, the tiniest insect creates enough ripples to affect clarity.
As I prepared the photos for this update, I was stunned to see something just inside the arch that I had not noticed. It could be a trick of the light but there appears to be two pipes about 4inch diameter penetrating the vertical side of the arch on the viewer’s right. I hope to get a better view at my next visit when the water has cleared — I had been poking my brush in there a wee bit.
All pipe sizes so far are near-enough guesstimates. I will get round to accurately measuring them at some point.
Access on the tree-line side of the pool has been almost impossible. After my last visit, you can walk all around the circumference with ease.
I have not yet cleared all of the weed from the internal walls so there may still be a clue or two to be found. I will also try to clear out some debris from the bottom of the archway.
I am now armed with high-tech litmus paper. My last four visits to the pool have given a consistent reading of ph 5.0
This is a bit on the acid side of neutral and probably ideal for the ericaceous growth nearby (conifers and heathers).