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 6598.20 Aperture 7 (The Flickering Portal)
• MS 9209.29 Concordance of Divided Records
• MS 3701.41 Registry of Protocols (Primary)

  Registry of Protocols (Primary), often abbreviated as RoP(P), is the definitive, first-order ledger of all codified and sanctioned procedura…

• MS 6892.33 Third Concordance