 The Woollahra History & Heritage Society date the house to 1856, noting that the design may possibly be attributed to architect J. F. Hilly and note that under Gordon's occupation it was called "Seaford House" and this was changed to "Glenyarrah" during the stay (1883-1913) of Mr T. H. Kelly Snr.and family and later under Mr Spencer Brunton to "Gladswood".Gordon may not have been "Gladswood's" first resident, for an undated Council Rate Assessment entry, possibly no later than 1863, records Gordon as owner with a J. H. Atkinson as "person rated".