| Description | /1. 1 x ts. letter, 21 October 1975, with information attached, from Prof. Richard L. Gregory, University of Bristol, to Roland Penrose, 16p.
/2. 1 x ts. letter, 3 December 1975, from Prof. Richard L. Gregory, University of Bristol, to Roland Penrose and Lee Miller, 1p.
/3/1. Christmas card, n.d., from Richard Gregory, Bristol, to Roland Penrose
/3/2. Christmas card, n.d., from Richard Gregory, Bristol, to Roland Penrose
/3/3. Christmas card, n.d., from Richard Gregory, Bristol, to Roland Penrose
/4. Christmas / New Year card, n.d., from PION (publishers of 'Perception'), to Roland Penrose |