Source: photograph by volunteer
The large flints which appear in the buttresses of the fountain remind us that flints were mined on the site of the garden in medieval times. A reminder of the extensive system of tunnels (see PGPT346), which still survives in the area, came in 1984 when a bus, travelling up the Earlham Road towards the city, suddenly slipped into a hole created by the collapse of the roof of one such tunnel just opposite the entrance to the garden (PGPT347). Fortunately nobody was hurt, but considerable work was done to prevent a repetition of the accident.
The flints were embedded in chalk, which by the 19c was burnt in 2 lime kilns in the garden to make mortar for building work.