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 0597.09 Department of Stack Integrity

  The Department of Stack Integrity is a senior administrative body within the Tower, charged with the practical application and enforcement o…

• MS 5720.07 Luminal Observation and Registration Facility
• MS 3979.43 Merrow Quill
• MS 0872.10 Subject of Precedence
• MS 1276.84 Vault of Lost Causes

  The Vault of Lost Causes is a restricted, humidity-controlled archival chamber located on the descending eastern spiral of Floor 404: The Ar…