The middle terrace arched feature, left arch springing. Stone 38 (MT6) is the billet impost block, with the fret voussoir, stone 26 (MT7) above it.(

Image of the feature "VI. Loose Sculpture: 14. Fret voussoit type 1 (2 stones)" at Windsor Castle.

by Ron Baxter.

Voussoirs carved on the face with a half-unit of the fret, or embattled, ornament with a half-roll profile. There are two voussoirs of this design, both incorporated into garden features.