During this period, he became assistant editor of
Ballet, a magazine established just before the war by critic
Richard Buckle. He resigned in 1950 and then founded, designed and edited
Dance and Dancers, the first of a family of arts magazines published by Philip Dosse. He edited the magazine for thirty years, mainly from his home in
Eaton Square. He was the dance critic for the
Daily Mail newspaper from 1950 to 1953. He was then the deputy critic for the Sunday newspaper,
The Observer, from 1970 and became its main critic in 1982. Williams also wrote or edited a number of books and exhibition catalogues. Among them are
Covent Garden: 25 Years of Opera and Ballet, Royal Opera House (London: Victoria and Albert Museum, 1971);
Ballets et Danseurs dans le Monde: Photographs de Serge Lido, with Odon-Jerôme Lemaitre (Paris: Éditions Vilo, 1973); and
50 Years of Ballet Rambert, 1926–1976, with Clement Crisp and Anya Sainsbury (Ilkley, West Yorkshire: Scolar Press, 1976). His most important work of dance writing, however, is his book
Masterpieces of Ballet Design (Oxford: Phaidon Press, 1981), an erudite and heavily illustrated discussion of the history of ballet stage décor. ==Committee man==