13Harbison, Peter. Pilgrimage in Ireland: the Monuments and the People. Syracuse, NY: Syracuse Univ., 1992. 223.
The author also notes the "Deer Stone" found at the ruined monastic site of Glendalough. The legend tells how in response to St. Kevin's prayer to save the lives of twin newborns whose mother had died, a wild doe came down and filled the bullaun with its milk. "The water in the Deer Stone is reputed to have the power of healing, but in order for the cure to be effective the pilgrim must crawl round the stone seven times before sunrise, fasting, and saying the necessary prayers." (p. 108)