Blake's poem Beneath the poem Blake inscribed a quotation from the Bible: "Dark Satanic Mills" The phrase "dark Satanic Mills", which entered the English language from this poem, is often interpreted as referring to the early Industrial Revolution and its destruction of nature and human relationships. That view has been linked to the fate of the Albion Flour Mills in Southwark, the first major factory in London. The rotary steam-powered flour mill, built by Matthew Boulton, assisted by James Watt, could produce 6,000 bushels of flour per week. The factory could have driven independent traditional millers out of business, but it was destroyed in 1791 by fire, perhaps deliberately. London's independent millers celebrated, with placards reading, "Success to the mills of Albion but no Albion Mills." Opponents referred to the factory as satanic, and accused its owners of adulterating flour and using cheap imports at the expense of British producers. A contemporary illustration of the fire shows a devil squatting on the building. The mill was a short distance from Blake's home. Blake's phrase resonates with a broader theme in his works; what he envisioned as a physically and spiritually repressive ideology based on a quantified reality. Blake saw the cotton mills and collieries of the period as a mechanism for the enslavement of millions, but the concepts underpinning the works had a wider application: Another interpretation is that the phrase refers to the established Church of England, which, in contrast to Blake, preached a doctrine of conformity to the established social order and class system. Stonehenge and other megaliths are featured in Milton, suggesting they may relate to the oppressive power of priestcraft in general. Peter Porter observed that many scholars argue that the "[mills] are churches and not the factories of the Industrial Revolution everyone else takes them for". In 2007, the Bishop of Durham, N. T. Wright, explicitly recognised that element of English subculture when he acknowledged the view that "dark satanic mills" could refer to the "great churches". In similar vein, the critic F. W. Bateson noted how "the adoption by the Churches and women's organizations of this anti-clerical paean of free love is amusing evidence of the carelessness with which poetry is read". An alternative theory is that Blake is referring to a mystical concept within his own mythology, related to the ancient history of England. Satan's "mills" are referred to repeatedly in the main