From the above:
Rev. Skinner, another antiquary, reported in 1830 that Dolebury Levvy was 50 yards long, but it is in fact 184 feet (56 metres) long, a roomy horizontal passage. It was dug in six months by six miners, who were each paid 9 shillings per week (£0.45).
Only a thin vein of lead ore was found; it was never worked.
Later the levvy was blocked to prevent poachers looking for rabbits, but was reopened by B.E. Somers in 1904, but again, it was not worked. Later, during the second World War, it was used by an auxiliary unit of the Home Guard.
The levvys have little caving potential, but are interesting for historical reasons. They are not very challenging, but provide an insight into the lengths the miners went to in the search for mineral wealth.