 That year he accepted the Stewardship of the Manner of East Hendred to succeed his late father in a by-election at Breconshire, which he represented until his death.In 1771, he inherited the Tredegar estate from his elder brother, Sir Thomas Morgan, and succeeded him as Lord Lieutenant of Brecknockshire.The castle on Morgan's estate at Rhiwpera burned down in 1783, and rebuilding was not completed until after his death.