History of Antietam National Cemetery (Masons - page 28)
Grand Master.—Have you applied the Square to those parts of the Stone that should be square ?
Deputy Grand Master.—I have, Most Worshipful Grand Master, and the Craftsmen have done their duty.
Grand Master.—Right Worshipful Senior Grand Warden : What is the proper Jewel of your office ?
Senior Grand Warden.—The Level.
Grand Master.—Have you applied the Level to the Stone ?
Senior Grand Warden.—I have, Most Worshipful Grand Master, and the Craftsmen have done their duty.