Traded at 4 Essex Bridge (1809 & 1820), 3 Essex Bridge (1810-2, 1818-9 & 1821-6 ) & 63 Essex Bridge (1827-37), all Dublin, Ireland. Partnership with Jonathan Mason (1805-17), succeeded by Seacombe Mason (w.1838-78). Designer of the Mason pschrometer (hydrometer with wet & dry thermometers)