Floor 4,420
- Holdings shelved
- 3
- Survey
- incomplete
3 holdings are shelved on this floor. A shared floor records where volumes sit and nothing about what any of them says; these are neighbours, not relations.
- MS 3592.43 Class (Auto-invalidating)
- MS 9663.83 Phase Alpha (Days 1–24)
- MS 2086.88 Provisional Purity Seal