'Dart.i.fact | D'ärtə fakt | (Brit. Dart.e.fact) noun 1 an object or site found on Dartmoor, typically of cultural, historical or geological interest.'
Notes: Unlikely but good to list nonetheless.
Reference: Tim Sandles, Legendary Dartmoor, Gazetteer.
Reference: Steve Grigg: Dartmoor Explorations
‘I’ and ‘B’ on top of outcrop.