22Waddell, John, Joe Fenwick, and K. J. Barton. Rathcroghan: Archaeological and Geophysical Survey in a Ritual Landscape. Dublin: Wordwell, 2009. 37.
The painter Gabriel Beranger (1779) described his visit thus: "We found there some men waiting for us; and having lighted some candles we descended first on all fours through a narrow gallery, which for the length of 12 or 14 feet is the work of man, being masonry said to be done by the Druids, who performed here some of their secret rites."
Author Elyn Aviva has a blog entry about her modern descent into the cave.