(A Duergar is a malicious type of dwarf from North of England)
A story is told of a traveler who, being lost in bad weather, saw a light glimmering
a short distance away. He found a rough stone hut lit by a dying fire. On either
side of the fire were two stones and nearby, two logs. He sat upon one of the
stones and replenished the fire with some kindling. Shortly afterward, a Duergar
entered and seated himself on the opposite side of the fire. There they sat
until the fire burnt down again. The Duergar picked up one huge log and broke
it over his knee, then tossed into the fire. When it had burnt down again, the
Duergar indicated that the Traveler should put the other log onto the fire.
Suspecting a trick, the Traver did nothing. So they sat until dawn, when at
once the Duergar, the hut, and the fire disappeared, and the Traveler found
himself at the fallen edge of a sheer cliff. Had he gone for the second log
he would have fallen to his death!