And there behold the Loom of Locke whose Woof rages dire Washd by the Water-wheels of Newton. black the cloth In heavy wreathes folds over every Nation; cruel Works Of many Wheels I view, wheel without wheel, with cogs tyrannic Moving by compulsion each other: not as those in Eden: which Wheel within Wheel in freedom revolve in harmony & peace. (15.14–20, E159) Blake believed the paintings of Sir Joshua Reynolds, which depict the naturalistic fall of light upon objects, were products entirely of the "vegetative eye", and he saw Locke and Newton as "the true progenitors of Sir Joshua Reynolds' aesthetic". The popular taste in the England of that time for such paintings was satisfied with mezzotints, prints produced by a process that created an image from thousands of tiny dots upon the page. Blake saw an analogy between this and Newton's particle theory of light. Accordingly, Blake never used the technique, opting rather to develop a method of engraving purely in fluid line, insisting that: It has been supposed that, despite his opposition to Enlightenment principles, Blake arrived at a linear aesthetic that was in many ways more similar to the Neoclassical engravings of John Flaxman than to the works of the Romantics, with whom he is often classified. However, Blake's relationship with Flaxman seems to have grown more distant after Blake's return from Felpham, and there are surviving letters between Flaxman and Hayley wherein Flaxman speaks ill of Blake's theories of art. Blake further criticized Flaxman's styles and theories of art in his responses to criticism made against his print of Chaucer's Caunterbury Pilgrims in 1810. Sexuality "Free Love" Since his death, William Blake has been claimed by those of various movements who apply his complex and often elusive use of symbolism and allegory to the issues that concern them. In particular, Blake is sometimes considered (along with Mary Wollstonecraft and her husband William Godwin) a forerunner of the 19th-century "free love" movement, a broad reform tradition starting in the 1820s that held that marriage is slavery, and advocated the removal of all state restrictions on sexual activity such as homosexuality, prostitution, and adultery, culminating in the birth control movement of the early 20th century. Blake scholarship was more focused on this theme in the earlier 20th century than today, although it is still mentioned notably by the Blake scholar Magnus Ankarsjö who moderately challenges this interpretation.