On the left is a narrow doorway, neatly formed with thin schist stones, leading to the cloisters. Internally the church is entirely devoid of architectural decoration, but an extensive range of stalls, of which traces still exist, and other wood-work, including an open roof, must have redeemed an otherwise bald interior, into which very little light can have been admitted. The principal source of light was a 5 feet wide window at the east end (Fig. 1311), divided by mullions into three lanciform lights, [Illustration: FIG. 1309.--Oronsay Priory. Plan.] the pointed arch-heads of which run up to the main arch. The other gable, seen on the right in Fig. 1311, is modern, and forms the entrance porch to what may have formerly been the chapter house, but which has been appropriated, in recent times, as a burial-place by the proprietor of the island. Apart from this there were only three windows in the nave, two very small, and another rather longer with a cusped head, all formed in freestone, and on the extreme east end of the south wall near the altar a square-headed window with slab lintel and sill. Between these windows a [Illustration: FIG. 1310.--Oronsay Priory. Cross and South Side of Narthex and Church.] plain schist doorway gives access to the mortuary chapel of the M‘Duffies or M‘Fies, which is about 25 feet long by 12 feet wide over the walls. These are unbonded into the south wall of the church, and were covered with a plain lean-to roof, in which there was evidently a priest’s apartment. The chapel is lit from the south by two small windows, and in a recess on the north side is the burial-place of Abbot M‘Duffie, covered with a carved slab representing the abbot fully vested, with his right hand raised in benediction, and a pastoral staff in his left. Pennant says:--“In the same place is a stone enriched with foliage, a stag surrounded with dogs, and a ship with full sail; round which is inscribed ‘Hic jacet [Illustration: FIG. 1311.--Oronsay Priory. East End of Church.] Murchardus Macdufie de Collonsa An. Do. 1539 Meuse Mart Ora me ille, Ammen.’”[144] Beyond this chapel, at the south-east angle of the church, is a singularly massive buttress, at the bottom of which, on the level of the floor and accessible by a narrow opening from the interior of the church, is a curious ambry about 3 feet cube, strongly lintelled overhead, and designed, no doubt, for the safe keeping of the church treasure, but is now desecrated as a “bone-hole.” The altar still remains built of freestone, evidently reused from some previous building.