The site is notable for a carved Pictish stone located near the entrance to the fort, one of only a handful of such stones found outside the core Pictish heartland of North-East Scotland. Recent (2012) archaeological investigation has also found evidence of feasting and high-status metalworking at the site, and what has been interpreted as a constructed ceremonial processional route. Together these have led to speculation that the site might have been an important centre or location of royal inaugurations for a Brythonic kingdom centred in Galloway and South-West Scotland, circa 600 AD — perhaps to be identified with the elusive north British kingdom of Rheged, which gained greatest prominence under its legendary leader Urien at a similar time in the late 6th century before apparently utterly disappearing in the early 7th century.

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  1856 drawing of the symbols on the stone. To the left is a double disc with Z-rod, to the right a fish monster and a sword. The head with antennae is a 19th-century addition.
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  The stone in 2015, protected by an iron grille.

• Ronan Toolis and Christopher Bowles (2017), The Lost Dark Age Kingdom of Rheged: the Discovery of a Royal Stronghold at Trusty’s Hill, Galloway. Oxford: Oxbow Books, ISBN 9781785703119. (Publisher's website; JSTOR; Google Books). Official published report of the 2012 investigation.
• Interim report, October 2012

• Historic Environment Scotland. "Trusty's Hill, Anwoth (63641)". Canmore.
• Ronan Toolis (May 2017), Rheged rediscovered: uncovering a lost British kingdom in Galloway, Current Archaeology, 327
• James Hoare (31 January 2017), The Lost Kingdom of Rheged: What the Trusty’s Hill dig can tell us about Celtic Britain, History Answers
• Discovery of Lost Dark Age Kingdom In Galloway, Guard Archaeology, 15 January 2017
• The Galloway Picts Project, Excavation website
• A Window on Dark Age Galloway, Gatehouse of Fleet community and visitor website, Gatehouse Development Initiative.