Turning to the south side of Dublin, in the grounds of “Mount Venus,” a domain on the top of the hills, seven or eight miles from the city, is a large stone, twenty feet long (in line about N.W. and S.E.), ten feet broad, and three thick, leaning against an upright stone, eight feet high, and from three to five feet broad and thick [...]
The old man who drove me to the spot intimated that the visit to it was likely to lead to a double increase of my family, and this, coupled with the name of the hill, seems to point towards a tradition of phallic rites in connection with it.
Notes on Some Irish Antiquities
A. L. Lewis
The Journal of the Anthropological Institute of Great Britain and Ireland, Vol. 9, (1880), pp. 137-145.