George also became the owner of land around Roscrea and Nenagh in northern Munster, perhaps at his father's death or when his uncle George of Greenlaw and Roscrea died. He also became owner, together with Sir Basil Brooke and Sir George Russell of the Knockaunderrig silver mine at Knockanroe in the Silvermine Mountains south of the village of Silvermines, which lies south of Nenagh.