15 September 1755 – 21 September 1755

We walked an hour near the seashore [at Cubert], among those amazing caverns, which are fully as surprising as Pool’s Hole, or any other in the Peak of Derbyshire. Some part of the rock in these natural vaults glitters as bright and ruddy as gold; part is a fine sky-blue; part green; part enameled, exactly like mother-of-pearl; and a great part, especially near the Holy Well (which bubbles up on the top of a rock and is famous for curing either scorbutic or scrofulous disorders), is crusted over, wherever the water runs, with a hard, white coat like alabaster.