Robert Beatson LLD (1742-1818) was an ensign in General St Clair's regiment, the First or Royal Regiment of the Foot, later the Royal Scots. He took part in the raid on Rochefort in 1756, saw service in Ireland and took part in amphibious operations against Martinique and Guadeloupe. After the Seven Years' War he moved to Aberdeen, where he served as Barrack Master for forty years. Beatson was part of an intellectual circle that encompassed Adam Smith and other leading figures of the Scottish Enlightenment, including senior naval officers. The six volumes of Naval and Military Operations of Great Britain are regarded as his magnum opus and have influenced naval strategy from first publication to the present day. Andrew Lambert is Laughton Professor of Naval History at King's College, London, UK.