“....as we cruise again down the valley to Grindleford Bridge; first making a detour to visit the grand rocky platform of Hu-Gaer, (“The city of God”), and the old British fort of Caelswork (“which means, the fort or building of the Churl – Anglo-Saxon ‘Carl’” – and not “the work of the Gaels,” as a repitition of writers have it;) and to bask on Millstone Edge......”
Edward Bradbury ‘All About Derbyshire’ 1884