Amcham-Brasil Archives A contract is signed for the construction of the new Associação Escola Graduada de São Paulo: (from left to right) Mason G. Stell, president of the school’s Construction Committee; Egberto Teixeira, legal advisor of the American Chamber of Commerce; Emory Willians, Graded’s chairman of the Board, Charles S. Bosworth and Niels E. Hedeager, representatives of the construction company Hedeager Bosworth do Brasil S.A.