Slaggyford Stones 1
Image by StoneGloves

"Glendue Fell is still the horizon and the orientation is still too far north".

The local historians wonder how somewhere near the border of Cumbria and Northumberland achieved a Scottish name (and there is no consensus). My azimuth for the summere solstice sunset - without correction for the altitude of the horizon - is 313.91 degrees. It is confusing that part of Glendue Fell is called Black Fell and that the hill in front of it is called Black Hill. These are ordnance survey names and the local farmers use different ones. Hanging Shaw allotment, for instance.

It's odd that I watched many years sunsets in that place and that you are telling me what I can't have seen. It's a bit back to front. (It's a lot back to front). It's odd that I didn't photograph any sunsets, only sunrises. So now you're saying that what I saw is impossible, because the sun doesn't go that far north? And you're saying that the sun sets behind Glendue Fell and not behind Black Hill? I'd suggest you check your data points. From the Knar valley, on the south side, where I'd often work, we'd watch the sunsets moving further north. Eventually they'd reach this huge pile of stones, on the horizon. Then the sunsets would move away again, back to the south. Then they took the pile of stones away and made a road with it. I was told that if I interfered with the roadmaking I would disappear. That's not in your GoogleEarth!

Gaelic was spoken in the Anglo Gaelic kingdom ,e.g. the court at Bamburgh and Irish monks would have also had an influence . Other glens in Northumberland . Glen ,Dhu , Aln , Ridley ,Hill , Dale and River Glen .

You can’t take a picture of something or see it if a wall and trees are in the way and the fact that it couldn’t be seen even if the way was clear won’t help either . But you can calculate it . You must take the altitude into consideration , in the case of the line of stones to Glendue Fell (the horizon ,not Amos hill ) if the horizon was flat or minimal you would have been able to see the solstice sun set but in the real world it provides an altitude of 2.14 which means the sun never reaches that point .
Theres a bit more to this than Google Earth .