4 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 9331.98 Addendum 7 to the Seventeenth Concordance

  Addendum 7 to the Seventeenth Concordance is the ratified, 42-clause amendment that formally established the Office of Perpetual Affairs and…

• MS 1668.41 Guided Descents

  Guided Descent is the sole sanctioned practice of vertical transit to the unarchived floors of the Tower. It is administered under the provi…

• MS 1743.16 Nudge Marks
• MS 1603.41 The Error School