In operative Masonry, the word “Lewis,” is a term for an iron cramp, a device which is inserted into a hole or cavity in a large stone and then attached to a hook and pulley, allowing it to be hoisted to any height and placed into position within the construction of a building or other structure.
The instrument is made of a pair of dovetail wedges, with a hook or ring attached. Inserted into a space specifically crafted in the stone, pulling on the hook or ring spreads and locks the wedges into place. The greater the pull and the heavier the stone, the more securely the Lewis is locked into the hole.
But what meaning does the Lewis have in speculative Masonry?