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 0006.51 Annex of Provisional Truth
• MS 3883.53 Concordance on the Direction of the Archive
• MS 7033.96 Office of Unstable Geometries
• MS 1767.20 Well of Unwritten Precepts

  The Well of Unwritten Precepts is a shaft of dressed basalt in the north transept of the Chamber of Unwritten Precedents, on Floor 402, from…