In 1903, William Nichols, then Vice President of the
British Archaeological Association, produced a theory that the mines were made by the
Druids,
Romans and
Saxons. This theory was used to give names to the three parts of the caves: tour guides point out supposed Druid altars and Roman features. However, this is based on Dr Nichols' writings and has not been verified. The earliest documented evidence for a chalk cave is in 1737. (However, the earliest recorded mention of the mines and lime-burning kilns above, dates from a 9th-century Saxon charter and then not again until around 1232, this being that most likely because there was no taxation on them prior to 1232.) An opposing article in the next issue showed the similarity of the workings to coal mines in the
Newcastle area, and argued that most of the excavation had been made in the last two centuries and that the evidence for any
dene-holes was slight. However, a dene-hole does exist in what is known as the middle section. The caves were used between 1830 and the 1860s for producing lime. The 25-inch to a mile (approx 1:2,500)
Ordnance Survey map of 1862–63 describes the place as a "chalk pit" and marks an "engine house" and two remaining kilns. A further investigation produced, among other evidence, a letter from the son of one of the workers. ==TV and film==