Named in honor of Royston C. Twilley (1914– ), primary school teacher of the discoverer in Tooting, London, during 1954–1955. Twilley was the most inspiring of teachers, leading his pupils not only through the required curriculum, but also into areas of academic discipline not usually encountered by pre-teenagers. Especially noteworthy was a thorough exploration of the past and contemporaneous River Wandle, a short river nowadays flowing mostly underground through south London that in the eighteenth century sported a wide variety of industrial mills, a few of which were still in operation in the 1950s. During 1959 to 1977, Twilley was headmaster of two London schools, and after retiring he served as a School Governor of a Dorset primary school (1993-1994). (M 25976) _ _.