The Grisly Horror by Robert E. Howard

He was looking into a great dusty chamber which might have served as a ballroom in ante-bellum days; its lofty ceiling was hung with cobwebs, its rich oak panels showed dark and stained. But there was a fire in the great fireplace -- a small fire, just large enough to heat to a white glow the slender steel rods thrust into it.

But it was only later that Bristol McGrath saw the fire and the things that glowed on the hearth. His eyes were gripped like a spell on the master of the Manor; and once again he looked on a dying man.