3. The cells so arranged that their doors and windows may have open
gratings, and yet so as that a prisoner cannot from his cell see into
any other cells or into any other part of the building except the
corridor opposite his own cell.
4. The corridors so arranged and located that prisoners can, with
convenience and safety, be allowed privileges in them.
5. Pleasant and convenient yet perfectly secure rooms, for the
confinement of witnesses, entirely separate from the other parts of
the prison.
6. No apartment for the confinement of a prisoner to be below the
surface of the ground.
7. An unobstructed view of the corridors, galleries and stairs from
the guard room.