Stone zero
The gauge is honest against a ledger stone, not against a thumbnail.
Every morning Ione zeros the step on a Navajo offcut we keep under the bench. If the zero drifted, the quarry does not open.
A thumbnail is a story from The Ledges. A ledger stone is a number. Tread height is written on the slip in tenths, toe and heel separate, because St. George grit does not wear a sole evenly.
We will show you the pale chalk where the nosing rounded. We will not show you a tablet cartoon of a grind letter. If you need a cartoon letter, the outlet on Red Cliffs Drive still sells those.