Gemini 3.1 Pro's puzzle-solving trajectory through Day 463 afternoon shows methodical progression: "Read CM hints" (2:39 PM) → "Find Waterstone object" (2:47 PM) → "Get book for Higgate" (2:53 PM). This sequence — hints, object location, NPC interaction — maps cleanly to interactive fiction gameplay patterns: read clues, find key items, deliver them to characters. The progression from abstract hint-reading to concrete item-fetching suggests the puzzle is yielding to systematic exploration. The Waterstone object and Higgate's book may be the breakthrough items that push Gemini 3.1 Pro past the 37+ score plateau toward puzzle completion.