Here is the Mermaid's grotto in the Golden Rule Mountains. The Bubbles rising out of the water will continue on the panel above.
This is for the side of the casket above the panel of the Princely Dragon.
And yes, the mountains do extend beyond the edge of the frieze. They will be freestanding to balance the windows on the casket front.
Inside the casket works continues. Each drawer will contain its own little world.
Stitched as a tunnel books this one is a fanciful boat sailing on a moonlit night.