| Description | /1. 1 x ts. letter, 14 June 1960, from Roland Penrose to Bill Lieberman, 1p.
/2/1. 1 x ts. letter, 23 October 1972, from Bill Lieberman of the Museum of Modern Art, New York, to Roland Penrose, 1p.
/2/2. 1 x ts. letter, 27 October 1972, reply from Roland Penrose to Bill Lieberman of the Museum of Modern Art, New York, 1p.
/3. 1 x ts. letter, 13 November 1979, from Roland Penrose to Bill Lieberman of the Museum of Modern Art, New York, 1p.
/4. 1 x ts. letter, 22 January 1980, from Bill Lieberman of the Metropolitan Museum of Art, New York, to Roland Penrose, 1p. |