from The Century Dictionary and Cyclopedia
- n. A spiral or winding staircase; a hanging-stair.
Sorry, no etymologies found.
I was upon the screw-stair in total darkness, the key in my fingers.
Down the screw-stair I went in utter darkness; and having reached the stone floor I discerned the door and groped out the key-hole.
In a few minutes he stood in the wizard's chamber, and glanced around it with a feeling of discomfort rather than sorrow -- of annoyance at the trouble of which it had been for him both fountain and storehouse, rather than regret for the agony and contempt which his selfishness had brought upon the woman he loved: then spying the door in the farthest corner, he made for it, and in a moment more, his curiosity now thoroughly roused, was slowly gyrating down the steps of the old screw-stair.