 Over time, the couple acquired an additional of adjacent land, where Larz built three smaller mansions that were used as guest housing and storage.In 1914-16, after his return from diplomatic service abroad, Larz engaged the firm of Little & Browne to more than double the size of the mansion.Larz directed that architectural design elements from Lulworth Castle, an ancestral home associated with the Roman Catholic branch of the Weld family, be incorporated into the structure.