later works included "y blaned dirion" (the meek planet 1968, another science fiction novel), "y gromlech yn yr haidd" (the dolmen in the barley, 1971) and "eira mawr" (great snow, 1972). he also wrote a play, pamphlets, hundreds of articles and short stories as well as editing, with gwyn jones, "welsh short stories" for the oxford university press (1956). his work has appeared in english, german, italian and irish translation. he was lecturer and reader at the university of wales, lampeter between 1975 and 1988.