Introduction: speaking of chiasmus. Pattern recognition -- Memory patterns and patterns of memory -- Recovering the aesthetic of chiasmus -- Learning justice and practicing penance: Phlegyas and David. Echoes in the underworld -- Sanctifying the memory arts -- Echo in Arcadia: Sidney's legacy. The place of the eclogues -- The arcadian arts of memory. Mirror and allegory: Spenser's calling -- Unfinished books and double "scrines" -- Memorial edifices and "iust memorie" -- Extreme dramatic symmetry: Shakespearean triads. The triumph of Diana -- Chiasmus early and late -- Conclusion: chiastic echoes. The chiastic aesthetic recovered -- Patterns of memory and memory patterns -- Recognized patterns.