Henry Williamson (1890-1982), novelist, was the author of (among other works) Tarka the Otter and a cycle of fifteen novels collectively entitled A Chronicle of Ancient Sunlight, which was completed in 1960. He met Anna[bel] Cash in 1969, and wrote very frequently to her for the next year or so. The recipient became Anna Brook on her marriage in about 1973. For a fuller biographical description of Henry Williamson see EUL MS43.
From the guide to the Annabel Cash Papers, 1969-1973, (University of Exeter)