Book excerpt: This major work of historical and interpretative scholarship draws upon fresh evidence to set the Songs in a new perspective. Blake's etchings are substantially discussed alongside the poems they illustrate. The plates of both Innocence and Experience are considered in detail as Blake's response to social circumstances between 1782 and 1794. The reader is asked to re-think the nature of 'the Two Contrary States', and the relationship of the designs to the understanding of Blake.