| Description | Includes:
-five letters exchanged between Simpson and Peter Willis, University of Newcastle upon Tyne, dated 20 May-20 August 1970, concerning portraits of Charles Bridgeman
-letter from Letitia Simpson to Anna Murray Vail, dated 31 Augsut 1937, concerning a picture of Pere Isaac given by Knoedler Galleries to the Museum of the City of New York |