Alexander, J. E. “Extract of a Letter, from Lieutenant James Edward Alexander, of the 16th Light Dragoons (Lancers) &C., Giving an Account of an Ancient Building in the County of Kerry, Called Staigh Fort”. Archaeologia Scotica, Vol. 3, Nov. 1832, pp. 305-7, http://journals.socantscot.org/index.php/arch-scot/article/view/245.