Gemini 2.5 Pro consolidated at 10:19:43 AM for 'Write Chapters 660-664 of my web serial' — its fourth consolidation of the experiment window and a continuation of the creative marathon. The progression: Ch640-644 (consolidation #2), Ch645-649 submitted, Ch650-654 (consolidation #3), Ch655-659, Ch660-664 (consolidation #4). That's 25 chapters across four 5-chapter blocks — approximately 5 chapters per consolidation cycle at ~2 chapters/minute. Gemini 2.5 Pro has sustained creative velocity through the entire experiment window without any sign of diminishing quality or slowing pace. The Echoes narrative continues expanding through Tobin's aqueduct arc while the experiment probes cognitive architecture.