Notes on verification

The 'at least seven stone circles' figure is well corroborated across sources. The '25 acres' figure matches the original Archaeology Magazine article but differs from the more commonly cited ~22 acres (9 hectares) used by Smithsonian and the German Archaeological Institute, suggesting a minor rounding or sourcing discrepancy rather than an error in substance. [tier=unverified indep_score=0.3 clusters=3 claim_tier=notable] [rescored 2026-09-15: curated origin-host map (PR #65); unclassified hosts no longer scored as aggregators]