| Description | /1/1. 1 x ts. letter, 9 July 1968, from Edwin A. Bergman, Chicago, to Roland Penrose, 1p.
/1/2. 1 x ts. letter, 16 July 1968, reply from Roland Penrose to Edwin A. Bergman, 1p.
/2/1. 1 x ts. letter, 4 August 1976, from Marianne W. Martin, New York University, to Roland Penrose, 1p.
/2/2. 1 x ts. letter, 18 August 1976, reply from Roland Penrose to Marianne W. Martin, 1p. |