In 1895, Montalto was sold to George Colman Kelly, a pastoralist, councillor and one of the original shareholders of Broken Hill Proprietary Limited.. An 1899 MMBW plan of the area shows Montalto standing hard up against the Orrong Road boundary with verandahs on the principal facades facing south and west. George Kelly’s widow Agnes remained at Montalto after his death in 1909. George and Agnes had three children including Mabel (Mab) Louise, Lady Grimwade, nee Kelly. In 1909, two months before her father’s death, Mab married Wilfred Russell Grimwade (1879-1955).