Overview MARGRETTA STEWART DIETRICH [a.k.a., "Sister Pig"; "Piggy"; "Peeg"; "Pat"; Mrs. Charles H. Dietrich] Correspondence from Maria Chabot to Margretta Dietrich: Twenty letters and seven postcards from Chabot to Dietrich, Oct. 29, 1937 - March 24, 1958. The correspondence from 1937 and 1938 concerns Chabot's travels in Europe with Dorothy Stewart. The letter of [August 22, 1938] details her study of British Colonial Administration at Oxford and compares it with the American Indian Civil Service....