Mr. and Mrs. Donald R. Wright of New London, N.H., celebrated their 50th wedding anniversary at Brandon Hall over the Labor Day weekend with their family and friends. Mrs. Wright is the former Polly Horne of Natchez. The couple has three sons, Walt of Peoria, Ariz., Tim of Truckee, Calif., and Andy of Tenafly, N.J., who with their families, honored their parents with the weekend gathering.