Prince William Augustus, Duke of Cumberland, (1721-1765) was the younger son of King George II of Great Britain, (1683-1760) and at the tender age of four was created Duke of Cumberland, Marquess of Berkhamstead in the County of Hertford, Earl of Kennington in the County of Surrey, Viscount of Trematon in the County of Cornwall, and Baron of the Isle of Alderney.
His army career began in 1742 and in the December of that year he became a Major-General. By 1745, he was the leading British General chosen to end the then successful career of Charles Edward Stuart, also known as The Young Pretender in the Jacobite rebellion. On the 16th April 1746, he fought at the decisive Battle of Culloden in which the forces of the Pretender were defeated.
Between 1750 and 1755, Prince William Augustus had Fort Belvedere built on Shrubs Hill in Windsor Great Park, overlooking Virginia Water.
A copy of this mezzotint by Gerhard Bockman published by John Bowles circa 1750-1775, is in the Archive Collection of the National Portrait Gallery, London.