Rosstrevor, County Down

Bence-Jones, Mark. 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. 247. “(Ross-of-Bladensburg;LGI1912) An early C19 Tudor-Revival house with a long, irregular front of large and small gables, and with many tall chimneys. The seat of the Ross family, who were granted the hereditary distinction “of Bladensburg” by the Prince Regent in recognition of the victory won by Major-Gen Robert Ross in the American War of 1812-14.” 

http://lordbelmontinnorthernireland.blogspot.com/2015/11/ross-of-bladensburg.html