The plaster in the north aisle had been taking water for a decade. Conservators spent eleven weeks injecting lime grout behind four detached panels and fixing the edges with Japanese tissue and a lime-based adhesive.

The panels are stable. They will not stay stable if the roof keeps leaking, which is why the two contracts were let together. The roofers start in July; the humidity loggers are already in place.

Total conservation cost: $41,200. The roof: $68,900. Both are inside the $150,000 project budget, and both are itemised in the ledger.