necessary features. 
FIG. 80. The grouping of members in the lower piers has reference to the arch orders and to the vaulting of the aisles only, the high vaults having no connection with them; these piers are of three varieties, whose sections are given at A, B, and C, respectively, in Fig. 81. The small detached shafts of A and B are in two monolithic sections, and are bonded with the pier by a band at their junction. The engaged shafts of the section C are built up in courses with the main body of the pier. These are indeed pretty sections, and the actual piers are objects of much beauty, but their want of connection with the vaulting is a structural defect which among others excludes this nave from the category of strictly Gothic erections.
FIG. 81.
The clerestory is again of the general Anglo-Norman type which retains a good deal of solid wall beneath the arch of the vault. Both it and the triforium differ from
