Introduction: Mapping Nights H-VI As we have seen, in Night the First Blake experimented and struggled with complex narrative rules and perspective techniques-in some ways the most original and difficult in the poem for both the reader and for Blake himself-which subvert the possibility of reconstructing from Night I's textual surface an underlying narrative world whose events obey the laws of linear causality. It must seem, therefore, somewhat of a retreat when, in Nights the [Second]' through the Sixth, Blake tempts the reader with pervasive clues which suggest that the narrative events are now unfolding according to the already discredited conventional principle of linear causal dependence. As might be expected, however, Blake under- mines this apparent causal movement with local disruptive details which he, at times almost perversely, challenges the reader to overlook or disre- gard. Blake facilitates this fiction of causal sequence by using a primary plot division-which exists invariably one-half to two-thirds of the way through each Night of The Four Zoas -to connect and overlap Nights II-VI, rather than to separate them, as he does in all the other Nights. For example, the final segment of Night II connects more closely to the open- ing segment of Night III than to the opening segment of Night II: this process holds for the entire sequence of Nights II-VI. In these Nights, the plot divisions nearly override the physical breaks between Nights, almost as if Blake purposely sought to misplace those breaks. While the end of VI and the beginning of VIIa constitute a common plot, Night VIIa deci- sively swerves away from this narrative strategy in its final third and (through heavy revision) breaks the chain of causal overlapping in a way that prevents it from being resurrected in the later Nights. In some cases, as with the revisions and rearrangements of Nights VIIb and VIII, Blake seems to have made narrative decisions, at least in part, with an eye to frustrating the reader's desire to be handed such neat plot overlapping between consecutive Nights. Blake initiates a seductive dialectic between the forward thrust of the dominant narrative features and the persistent reminders that subsequent events intersect with and are aspects or versions of prior events. The characters and the narrator seem determined to cling to fictions that make sense of things causally, but the details of their actions and utterances work constantly to undermine these metaphysical fantasies. Each of these five Nights seizes as its dominant narrative fiction one or more of the techniques of Night I. Night II emphasizes discontinuous jumps between discrete levels of a four-tiered perspective hierarchy: these levels are modes of Urizen's creation of the Mundane Shell and its transfor- mation into his golden heavens. Although this technique resembles Night I's sudden leaps to glimpses of the "Divine Vision" or "Beulah," its opera- tion in the perspective hierarchy in Night II virtually generates a new narrative technique. Each of these four levels of perspective is assigned its The apparent narrative retreat to the principles of linear causality in Nights II-VI There is no Night Blake unequivocally named "the Second." The invariable internal plot division of each Night of The Four Zoas The use of this pattern in Nights II-VI The transformation of this pattern in Nights Vila, Vllb, and VIII. The narrative strategies of Nights II-VI incor- porate and revise the structural techniques developed in Night I.