Source: photograph in PGPT archive
The Plantation garden was built in a quarry, where chalk extraction had succeeded or accompanied mining for flints. These are examples of the fresh flints which can emerge when the soil is penetrated to any depth.
Flints were used extensively in building the garden, both as uncut pebbles (see PGPT148) and cut or knapped. Some particularly large flints were used in the arched buttresses of the fountain (see PGPT089). Many of the medieval churches in Norwich were built from flints and many of those flints may have been obtained by tunnelling in the area around the Earlham Rd. These tunnels have been explored from the 19c (cf PGPT346).