mason

Among the finds at the dig were a section of wall, cut stones with a masons mark, pottery, slate and a Henry III coin dating from around 1270.

It’s a high-tech twist on the classic mason jar, using a silicone lid with a degassing valve and an AirGone Argon Gas Canister to flush out oxygen.

The team of masons, covered in dust and sweat, had been working in the ruins of the Altadena house for hours when a shout echoed across the wreckage.

An estimated 2,000 masons, carpenters, restorers, roofers, foundry-workers, art experts, sculptors and engineers worked on the project - providing a huge boost for French arts and crafts.

Gravestones are looked after privately, rather than by the city council itself, with families usually hiring a stone mason to work on them.