and a tower over the crossing. The eastern part of the choir (Fig. 983) forms the presbytery, which, like that of most Scottish churches, is without aisles, and is lighted by a large central and two side windows, all containing late tracery. On the south side of the choir, west of the presbytery, is an aisle, separated from it by two circular piers and three arches. From above the caps of the piers two bold arches are thrown across the south aisle, after the manner of flying buttresses (Fig. 984). It will be observed from this view that there is a peculiarity of construction in the upper part of the choir walls, the clerestory windows being placed over the piers and not over the arches, as is usual. This arrangement has had the effect of preventing the flying arches or buttresses from being carried as high as they might have been (Fig. 985) had the windows been placed over the arches in the ordinary manner. The flying arches or buttresses are thus very low, and interfere with the space in the aisle (see Plan). There are a sedilia, with three divisions, and a piscina (Fig. 986) near the east end of the south wall of the choir. Part of the pavement there still exists, and two steps are observable in the floor.
On the north side of the choir is the sacristy, which occupies the place of the north aisle. The door to the sacristy (Fig. 987) is of fine design, and the ornament of the caps of the shafts (Fig. 988), together with the caps of the piers between the choir and the south aisle and the arches of the crossing (Figs. 989 and 990), exhibit fine examples of Celtic carving, mixed with grotesque figures. Carving of an identical description is shown in Figs. 991 and 992 on slabs in St. Oran's Chapel, one of which, dated 1489, also exhibits late Gothic ornaments on the edge. This stone bears the following inscription, from which it would appear to be in memory of the father of Abbot Macfingone, and of the abbot himself (whose tomb and monument are preserved in the choir, as will be pointed out further on):—"Hec : est : Crux : Laeclanni : Meic : fingone : et : ejus : fil—Ohannis : Abbatis : de : Hy : facta : Anno : domini : M^{o.} CCCCLXXX : IX^{o.} Numerous examples of carving of a very similar description occur throughout the West Highlands, and, where dated, are all of about the above period. The undated specimens are also distinctly in the same style and of the same epoch. There can, therefore, be no hesitation in assigning the sculpture in the cathedral, which is of a similar character (such as the caps in Figs. 988 and 990), to about the same date. The dog-tooth ornaments in Fig. 993 and other similar examples, which are not rare at Iona and throughout the Western Islands, are thus clearly a revival, at a late date, of ancient forms.
Close to the sacristy door, but raised to a considerable height above the choir floor, stands a round column (see Fig. 983), which supports two pointed arches. These arches appear to have opened into an upper aisle or chapel. They are carved with rows of dog-tooth or nail-head ornaments, which have the appearance of thirteenth century work; but as they are
