Referencing Master Melter Gretz — The Sacred Ledger

The Saint-Bone Melter
The wall is the only sermon the Enemy has ever been forced to hear
The artisan who feeds the bones of saints to the kiln and receives in return the mortar that holds the Sagittal Line together. The arithmetic is simple and brutal: a femur in a reliquary inspires; a femur in a wall holds.
Codex Ref. XII.40.01-001