The subject of this painting, long known as An Officer of the 4th Regiment of Foot, has now been identified as Richard St George Mansergh-St George (1757–98), who joined the 4th Regiment at the start of the American War of Independence. He saw action in America at the battles of Brandywine and Germantown, where he received a bullet to his head. In 1785 he left the army and retired to his family estates in County Cork, Ireland. Mansergh-St George was murdered by Irish rebels at the beginning of the Irish Rebellion of 1798.