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: 18. Impost blocks (4 stones)" at Windsor Castle.

by Ron Baxter.

Stone 38 is set into the Middle Terrace arched feature, stone 39 is loose in the flower bed at the foot of the lower moat wall, and 40 and 41 are in the Herbere pavilion.