Maggie Stuart and Arabella, daughter of her jailor, the Burnt Man
"We arrived at last at a place where a little side tunnel arced out to the right, and then back to the main passage, leaving a little door-less room. This was our destination. The pillar left by the diversion had been carved down into a recessed shelf on the side away from the main tunnel and it was onto this my guards lifted me. There was a depression in the shelf containing a sheet of foam rubber and a pillow. Attached to the wall above these was a fat, iron chain leading from a thick staple pressed into the stone. At each end of the chain were shackles which they locked around my wrists with a key. Three identical alcoves faced me across the narrow passage."