20O'Donovan, John, and Michael O'Flanagan. Letters Containing Information Relative to the Antiquities of the County of Meath, Collected during the Progress of the Ordnance Survey in 1836. Bray, 1927. 96.
Of the Cailleach, Ó Crualaoich writes, "This personage is regarded in traditional cosmology as the personification, in divine female form, of the physical landscape within which human life is lived and also of the cosmic forces at work in that landscape. These forces can range from the power of wind and wave - seen at their most dramatic in fierce winter storms - to the pastoral and nurturing fertility forces of plant and animal life-orders within the landscape." (Ó Crualaoich Gearóid. The Book of the Cailleach: Stories of the Wise-woman Healer. Cork: Cork UP, 2003. 10-11.)