[235] Dehio and von Bezold, II, p. 234, Fig. 1.
[236] A larger number of tiercerons is frequently found but not in vaults without liernes, except in very rare instances such as Oxford Schools Tower, where there are three pairs of tiercerons in each severy. Plan in Bond, p. 324-8.
[237] Bond, p. 340.
[238] Illustrated in Bond, p. 329.
[239] Illustrated in Bond, p. 331.
[240] Michel, III, p. 27, Fig. 17.
[241] Illustrated in Bond, p. 329.
[242] Illustrated in Bond, p. 330.
[243] See also illustration in Bond, p. 332.
[244] See illustration of Gloucester choir in Bond, p. 334.