3 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 4506.51 Floor 317

  Floor 317, commonly designated the Surveyors’ Atrium, is a foundational cartographic and spatial reconciliation floor located between Floor …

• MS 5377.62 Preliminary Folio
• MS 9495.96 School of Permeable Boundaries

  The School of Permeable Boundaries is a dominant ontological school within the Tower, formalized in the aftermath of the Crisis of the Ambiv…