Lady Mary Faith Montagu

Lady Mary Faith Culme-Seymour (née Montagu, previously Nesbitt; 1 November 1911 – 16 February 1983) was a British aristocrat and letter writer. The daughter of the 9th Earl of Sandwich and American heiress Alberta Sturges, she grew up at the family's ancestral seat, Hinchingbrooke House in Huntingdon. When her brother, Victor Montagu, 10th Earl of Sandwich, sold the family home in 1955, Lady Faith took her close friend, the novelist E. M. Forster, to see it one last time. Her last tour of the home with Forster was an emotional one, and she documented the experience in her diary and in letters. She and Forster, who initially offered her advice on short story writing, remained friends until his death.

Through her second marriage, to Sir Michael Culme-Seymour, 5th Baronet, Lady Faith was the châtelaine of Rockingham Castle in Northamptonshire, where she oversaw the renovation and redecoration of the house.