Correspondence, mostly letters writen to Gascoyne, of his relations. Indexed selectively.
- Letter to Gascoyne from Leslie Gascoyne, his father, 1958.
- Letters to Gascoyne from Winifred Gascoyne, his mother, [1957?]-[1969].
- Letters to Gascoyne and after his death, to Judy Gascoyne, from John W. Gascoyne, his brother, and Joan Gascoyne, his sister-in-law, 1954-2002.
- Letters to Gascoyne and after his death, to Judy Gascoyne, from Tony Gascoyne, his brother, and Paddi or Paddy Gascoyne, his sister-in-law, 1972-2001.
- Letters to Gascoyne and after his death, to Judy Gascoyne, from Robert G. (‘Mick’) Mares, a kinsman, 1988-2002. Includes genealogical researches and an account of Gascoyne’s funeral.
- Letter to Winifred Gascoyne, Gascoyne's mother, from Florence Mole, Gascoyne's god-mother, 1965.
- Letters to Winifred Gascoyne, Gascoyne's mother, from Pam Emery, her sister
- A farewell booklet from the fellow-employees of Leslie Gascoyne, Gascoyne's father, on his retirement in 1946.
- Letters to Gascoyne and to Judy Gascoyne, from Carole French, Gascoyne's cousin, 2000-2001.
- Letters from Ben Tyler, brother of Judy Gascoyne, and his wife Joan, to Judy Gascoyne, 2001-2002
- Letters from other minor and unidentified relations, including M. Elizabeth Snider, a relation and family historian.