sentences:  As the Ruskin scholar Helen Gill Viljoen noted, Ruskin was increasingly critical of his father, especially in letters written by Ruskin directly to him, many of them still unpublished.Ruskin gave the inaugural address at the Cambridge School of Art in 1858, an institution from which the modern-day Anglia Ruskin University has grown.In "The Two Paths" (1859), five lectures given in London, Manchester, Bradford and Tunbridge Wells, Ruskin argued that a 'vital law' underpins art and architecture, drawing on the labour theory of value.