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 6148.28 Archival Silence
• MS 2131.34 Cerulean Quartzite
• MS 4644.11 Chamber of Anticipated Sound

  The Chamber of Anticipated Sound is the Tower's principal instrument of acoustic foresight, a vaulted hall on Floor 407 in which a sound is …

• MS 5230.02 Court of Fiscal Ambiguity
• MS 2230.10 Tower Standard Year 14,322

  Tower Standard Year 14,322, formally designated the Year of the Lapsed Standard, constitutes a singular unit within the Standard Tower Chron…