Upper Labyrinth

The Upper Labyrinth is described as part of the boundary between the Decenarian and Centenarian communities within a concent. An avout expects to be summoned there as the Centenarians prepare for their rare opening, suggesting that it serves as a controlled interface between maths rather than an open corridor.

Role and Function

• Separates the Decenarian Math from the Centenarian Math.
• Used for formal, controlled communication with the Centenarians in the lead‑up to their Apert.
• Access involves reaching a grate in a dark room, behind which a Hundreder poses questions; the exchange supports Centenarian preparations for opening their gate.

Notable Features

• A labyrinthine approach culminating at a barred grate.
• The interview setting is explicitly described as a dark room, underscoring its controlled and secluded nature.

Context and Status

• Mentioned in connection with the long‑cycle opening of the Centenarian Gate, when the Hundreders plan their rare interactions beyond their walls.
• Its use is attested by a Decenarian teacher who anticipates being called there in the years preceding that opening.
• Recollections within the math note that a senior avout once entered the Upper Labyrinth after supper and was not seen in the math for many years, underscoring the seclusion of its internal passages.

No broader layout or detailed map of the labyrinth is provided; only its boundary role and the interview-through-a-grate practice are described.