Floor 4,164
- Holdings shelved
- 5
- Survey
- incomplete
5 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 5292.42 Class Ψ
- MS 3840.75 Floor 112 (the Arbour of Perpetual Dusk)
- MS 2614.03 Hypothetical Atmospheres
- MS 9053.22 The Anomaly Acquisition (23–28 Thermidor)
- MS 0578.61 The Doctrine of Procedural Primacy