Complex sentence: On 19 February 1791 Aufrere married Marianne Matilda, only surviving daughter of General James Lockhart, of Lee and Carnwath in co. Lanarkshire, by whom he had a daughter Matilda (b.1792) and a son George Anthony (b.1794).
Split into simpler sentences: On 19 February 1791 Aufrere married Marianne Matilda, only surviving daughter of General James Lockhart, of Lee and Carnwath in co. Lanarkshire. After the marriage they had a daughter Matilda (b.1792) and a son George Anthony (b.1794).