6 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 7641.78 Clerks of the Dry Nib
• MS 0609.25 Department of Departures
• MS 9115.12 Field Activation

  Field Activation is the procedural state by which a delimited area of the Tower ceases to be classified as unassigned floor space and become…

• MS 5429.88 Fugue Paper
• MS 0098.47 Mapping Registry, Floor 44
• MS 6701.05 Spiral 72 Aperture Delta

  Spiral 72, Aperture Delta is a north-facing aperture on the Delta stack, conventionally reckoned by the Office of Vertical Survey as lying b…