Megalithic mapping

[Boreades]

This page on the Brigantes Nation website
https://brigantesnation.com/vitrified-forts

That helped me find a few more places in Scotland.

Arka Unskel
Eileen na Goar
Castle Point

Now added to the map. All three look like more beaconages for coastal navigation.

The three in Lancashire/Yorkshire might be stray anomolies, due to the way they were constructed of layers of stone laid on timber.

Brigantes Nation mentions that Edward Hamilton wrote an article entitled “Vitrified Forts on the West Coast of Scotland". Without providing a source ref.
I've found a copy here.
https://archaeologydataservice.ac.uk/ar ... 27_243.pdf

From that, a few more added to the map.

Torr Dhuin, near Fort Augustus
Elsness & Quoyness, Orkney
Dunsinane Hill, Perth
Dumsturdy Muir, Forfar
Fenellas Castle, Kincardine
Cluny Hill, Forres
Doune of Relugas
Dun Evan or the Doune of Cawdor
Dun Daviot, Inverness
Dun le Chatti / Dunlichity
Thurots Bay, Islay
Dun Skeig
Carradale Bay

Places with aliases?

"Dun Ardiul" and "Dun Dhairgale" might be the same as Dun Deardail (or Dundbhairdghall) near Fort William
"Tor Duin" = Torr Dhuin, near Fort Augustus
Kyles of Bute = Burnt Islands

Also mentioned by Edward Hamilton, but not yet located.

Menefick, Forfar
Stonehaven, Kincardine
Brough Head, Banff
Thurots Bay, Islay

[Boreades]

Dr. Daniel Wilson, Prehistoric Annals of Scotland, vol. ii, p. 92, says—
The so-called vitrified forts, which have been the subject of many ingenious and baseless theories,
form another interesting class of native works. Dr.Wilson agrees with Dr. Hibbert, whom he quotes,
that the vitrifaction was an incidental and not a designed effect, and resulted accidentally
from the frequent kindling of beacon fires as signals of war invasions, as well as from
bonfires which formed a part of festive or religious rejoicings

Trad archeo minds seem (once again) fixated on the militant wars or religous ritual.
Mundane or low-status trade, shipping and navigation not much mentioned.

[Mick Harper]

Sounds like you've got enough, in an ideal world, for an academic paper that would put the whole subject to bed. Good luck finding that world. I recommend a YouTube as the next best thing. The reality is that nobody looks at websites any more, though they are useful for internal purposes. YouTubes get traction eventually if they hit a sweet spot. Which you clearly have.