Other Windsor, 6th Earl of Plymouth

Other Archer Windsor, 6th Earl of Plymouth (2 July 1789 – 20 July 1833 Deptford) was an English nobleman, the eldest and only surviving son of the 5th Earl of Plymouth by his wife and cousin, Hon. Sarah Archer, daughter and eventual co-heiress of the 2nd Baron Archer. He was sixth Earl of Plymouth of the 1682 creation.

He was born the only son, and had two sisters Lady Mary Windsor, who married Marquess of Downshire and Lady Harriet Windsor, who married the Hon. Robert Clive, a son of the Earl of Powis and grandson of Clive of India.

Styled Lord Windsor from birth, he inherited his titles from his father on 12 June 1799 at the age of ten, along with his father's land at Tardebigge, the country seat Hewell Grange, and land in Shropshire and Glamorgan. A year later (1800), his mother married Lord Amherst as his first wife, and bore him two sons. It is not clear if young Plymouth grew up with his stepfather (but highly likely); if so, he was exposed to the influences of Amherst's wide-ranging Court and political connections, culminating in his failed (1816) embassy to China. Plymouth was educated at Harrow.

He married Lady Mary Sackville (1792–1864), elder daughter of John Sackville, 3rd Duke of Dorset on 5 August 1811. There was no issue of the marriage, and Lady Plymouth later married his stepfather Lord Amherst (after his wife Plymouth's mother died in 1838). Since Plymouth was richer than his brother-in-law De La Warr (1791–1869), his mother-in-law Arabella, Duchess of Dorset and Countess Whitworth, left Knole in 1825 to her elder daughter Mary, on the grounds that her husband could better afford the annual upkeep of the house. By 1829–30, the Countesses of Plymouth and De La Warr (or rather, their husbands) had partitioned the Sackville family estates between them.

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