Access report / E-00The exterior is inside entrance room 00-A. The room is inside the foyer. Visitors arriving from outside are already here.

Concurrent volume / BAY-4Bay 4 occupies the same volume as procession P-01. The procession passes through without entering. Neither schedule lists the other.

Column register / 5-3Column line 5 leaves the north edge as 5 and arrives at the south edge as 3. No columns have been moved.

Circulation audit / G-02At the section break, the gallery's outer wall continues as its inner wall. Both faces retain exterior finish.

Level register / L3Wing L3 is drawn where it stands. It adjoins nothing on this level. Ascend S-00 until it recurs.

Wayfinding / O-05Door D-77 opens from the archive into the orrery. The two rooms are not adjacent. The door does not mind.

Occupancy / W-118Rooms 118 and 118 occupy the same survey. Both are occupied. Staff report no difficulty.

Fold register / F-2Wing R-217 / R-218 is drawn on both sides of fold F-2. It is one wing. Do not schedule meetings across the fold.

Datum conflict / P-04Every tread is marked UP. The closed stair circuit has no recorded descent.

Archive addendum / R-11West-stack measurements continue through the perimeter and return without crossing a threshold.

Party wall / W-21Wall W-21 is one wall. Room 00-12 and reading room R-01 stand on either side of it. Knock before filing.

Levels / B4The foundations are visible through the ground floor at this extent. The floor is not missing. Both are drawn as found.

Lift schedule / E-44Both lift doors arrive at this landing. The shafts are drawn on opposite sides of the same wall.

Section note / S-00The void beneath this stair contains the landing above. Four flights rise; the final landing retains the first datum.

Recovered plan / N-04This sheet was recovered from the entrance room drawn on this sheet.

Stair register / S-00Stair S-00 serves levels 1, 2, 3 and 1. Every flight rises. The numbering repeats; the building does not.