期刊名称：Scottish Archaeological Internet Reports. SAIR
电子版ISSN：1473-3803
出版年度：2001
卷号：1
页码：56-56
出版社：Society of Antiquaries of Scotland
摘要：In all, 412separate architectural fragments were recovered
and catalogued during the excavations
(these include two in situ springers of the ribbed
ceiling vault in room 5 and a grave slab re-used to
cover the great drain). The fragments appear to
derive exclusively from the area under excavation:
that is, they represent the remains of buildings
which have collapsed in situ, and which have since
undergone robbing and further reduction. The majority
of the fragments are the remnants of a system
of quadripartite vaulting, the principal means by
which the undercroft supported the floors above.
These perhaps escaped robbing because of their irregular
form, making them less attractive as
building blocks in comparison to the more regular
stones from the walls of the former structures. The
relative frequency of all fragment types in the assemblage
is shown in Table 1.
