Williamstown, Carbury, Co Kildare 

Mark Bence-Jones. A Guide to Irish Country Houses (originally published as Burke’s Guide to Country Houses volume 1 Ireland by Burke’s Peerage Ltd. 1978); Revised edition 1988 Constable and Company Ltd, London.    

p. 285. “A two storey C18 house flanked by wings and yards in the Palladian manner; related by the Knight of Glin to Colganstown and other houses attributed to the amateur architect Nathaniel Clements. Three bay front, Venetian window above tripartite doorway; wall carried up to form parapet, urns at corners. The seat of the Williams family.”