sentences:  From 1859 until 1868, Ruskin was involved with the progressive school for girls at Winnington Hall in Cheshire.A frequent visitor, letter-writer, and donor of pictures and geological specimens to the school, Ruskin approved of the mixture of sports, handicrafts, music and dancing encouraged by its principal, Miss Bell.The association led to Ruskin's sub-Socratic work, "The Ethics of the Dust" (1866), an imagined conversation with Winnington's girls in which he cast himself as the "Old Lecturer".