| Description | /1. 1 x ts. letter with ms. additions, 11 June 1956, from G. David Thompson, Pittsburgh, to Roland Penrose, 1p.
/2. 1 x ts. letter, n.d., from Roland Penrose to G. David Thompson, 1p.
/3. 1 x ms. letter, 26 June 1956, from G. David Thompson, Pittsburgh, to Roland Penrose, 1p.
/4. 1 x ts. letter, 3 July 1956, from E. C. Gregory of the ICA, London, to G. David Thompson, Pittsburgh, 1p.
/5. 1 x ts. letter, 6 August 1956, from G. David Thompson, Pittsburgh, to Roland Penrose, 1p. |