Ham House is a 17th-century house set in formal gardens on the bank of the River Thames in Ham, south of Richmond in the London Borough of Richmond upon Thames. It was completed by 1610 by Thomas Vavasour, an Elizabethan courtier and Knight Marshal to James I, but came to prominence during the 1670s as the home of Elizabeth Maitland, the Countess of Dysart and her second husband John Maitland, the Duke of Lauderdale. In 1948, the house was donated to the National Trust by Sir Lyonel…