FOOTNOTES:
[17] For illustrations consult the [Glossary] under Jamb.
[18] For illustrations consult the [Glossary] under Arch.
[19] Address to the Conference of Architects. Reported in the Builder of 24th June, 1876. Outlines illustrating some of these varieties of vault will be found in the [Glossary] under Vault.
[20] See [Glossary].
[21] For illustrations consult the [Glossary].
[22] For further illustrations see the [Glossary].
