The three letters, which are on the Bridge, signify that all obstacles are destroyed, & liberty of passage (“liberté de passer”)
This scene is described in the degree “Chevalier d’Orient” (‘Knight of the East’), the 13th degree in the system of Mirecourt.
Sometimes there are different letters on the bridge, such as “Y.H.” which would stand for Yaveron-Ha-mayim with the same meaning.
On the bridge are the twelve apostles. The bridge goes over the River of Sorrow (Starbuzanai).
Les Plus Secret Mysteres (1820)