Round this top floor runs a passage cut in the thickness of the walls, with numerous openings inwards opposite the windows, and widening somewhat when forming as it does the Triforium of St. John's Chapel.
"Authorised Guide to the Tower of London"
W. J. Loftie
12 Pier of Triforium.
"Our Homeland Churches and How to Study Them"
Sidney Heath
15 Tracery of Triforium.
"Our Homeland Churches and How to Study Them"
Sidney Heath