Scottish Cathedrals and Abbeys
The following is from Scottish Cathedrals and Abbeys by Rev. D. Butler, M.A.:
Chapter II - Sketch of Scottish Architecture
Late Pointed Period
The Middle Pointed passed by a gentle gradation into the
Late Pointed style, and it is difficult to say when the one ceased and the other
began. Yet there are some characteristics of the Third Pointed which are
peculiar to it and render it a distinct epoch. The large churches are nearly all
restorations, and no new churches of great size were undertaken. The Scottish
churches are usually smaller in size than the English ones, and consist of
single compartments without aisles. The east end frequently terminates with a
three-sided apse--a feature which owes its origin to the Scottish alliance and
intercourse with France. The leading and distinguishing feature is, however, the
vaulting--the pointed barrel vault being almost universally employed. The
windows of these churches are necessarily low, so as to allow the point of the
arch-head to come beneath the spring of the main vault. The buttresses are
generally somewhat stunted. The windows are almost always pointed, and contain
simple tracery derived from the earlier styles. The doorways are generally of
the old round-headed form, with late foliage and enrichments. Porches are
occasionally introduced, and coats of arms are commonly carved on shields of the
period, and are useful in determining the dates of portions of the buildings.
Towers were generally erected or intended, and are somewhat stunted, finished
with short spires, having small dormer windows inserted in them. Monuments are
of frequent occurrence, and are frequently placed in arched and canopied
recesses. Richly carved sacrament-houses are occasionally introduced, and
perhaps some of the good carving may be due to the French masons who were
numerous in Scotland during the reigns of James IV and James V. The structures
of the period were either parish or collegiate churches.
 Ecclesiastical Architecture of Scotland, vol.
iii. pp. 1-7.
Chapter III - Cathedrals