[14] The flying buttress is well shown in the view of Canterbury Cathedral (page 324).
[15] See page 386.
[16] For the pointed arch see the view of Melrose Abbey (page 660).
[17] See the illustrations, pages 550, 551.
[18] See page 310.
[19] See pages 207, 331.
[20] See page 444.
[21] Latin universitas.
[22] See page 536.
[23] The method of the school (Latin schola).