Publication Account

Date 2007

Event ID 587153

Category Descriptive Accounts

Type Publication Account

Permalink http://canmore.org.uk/event/587153

Euan W Mackie Broch Corpus 2

NG53 1 DUNAN AN AISILIDH

NG/5320 3571

This is a ruinous probable D- or C-shaped semibroch (or “galleried dun”) in Portree, Skye, situated on the edge of a cliff, at the far, or northern, end of a mile- long, sickle-shaped peninsula jutting into the Narrows of Raasay (visited 25/4/63 and 18/08/85). The end of the promontory is formed by a slightly higher, flat-topped rock bounded on the east and north-east by a cliff about 15m (50 ft) high the defensive enclosure stands next to this. There is a shallow gully separating this high end from the rest of the promontory and, on the far side of this, are two lines of large boulders – perhaps the remains of outer defences. As in the case of Dun Ringill (NG51 4) the ground slopes gently downwards to the south-west and away from the cliff edge, and the thicker galleried wall curves in a D-shape along this shallow slope.

The plan prepared by the Commission [2, fig. 256] is misleading in two ways. Firstly it suggests that there is a rocky shore immediately under the wall on the lower, south-west side of the knoll, but there is in fact a grassy terrace in front of the entrance and which extends round towards the south from it. The second point concerns the configuration of the stone wall in relation to the high cliffs on the east and north-east. The plan suggests that the wall curves round from the south arc – where it crosses the neck of the promontory above the shallow gully – along the east and along the cliff edge, thus implying that the site is nearly circular.

However the end of the visible part of the galleried wall in the south can be clearly traced pointing towards the cliff, and the structure appears to have a D-shaped plan, with the straight edge being formed by the cliff. There are faint traces of walling along the cliff edges. The similarity of the plan and situation with those of Dun Ringill and Dun Ardtreck is striking and makes it more likely that Dunan an Aisilidh is a semibroch.

The entrance faces west, towards a grassy slope and the rocky shore, and is at right angles to the line of the end of the promontory, pointing well away from the line of easiest approach. It is marked by a depression which is full of rubble, and no wallfaces can be seen; however the sides of an extension of the entrance back into the enclosed court can be clearly seen. The structure of the wall north of the passage cannot be made out although the outer face extends almost to the cliff; the pile of rubble here suggests that the wall is thick enough to contain a gallery. On the opposite side, in the southern arc, the wall shows a longitudinal gallery extending from a rounded end about 1m from the passage, for a distance of 17m; the wallfaces themselves are traceable for 3m more as far as the cliff edge.

In 1921 a door from the gallery to the interior was visible about 9.0m (30 ft) anti-clockwise from the main entrance but this can no longer be seen; it was 0.75m (2.5 ft) wide with the outer lintel still in position [2]. A turf-covered gap in the visible inner wallface probably marks its position. The gallery shows an average width of 53cm (1 ft 9 in).

The wall varies in width from 2.0m near the cliff on the east to a maximum of perhaps 3.6m near the entrance. The outer face on the south and south-west side is best preserved, standing about 3 or 4 courses (1m) high above masses of rubble. The internal diameter from east to west is about 15m and some 17m from north to south. This large interior and the relatively thin wall seem to confirm that the structure was never a free-standing broch.

The oddly zig-zag plan of the wall on the north in the Commission's plan is due to the presence of a deep gully projecting into the enclosed space. In fact there are traces of an outer wallface beyond this gully – not marked on the Commission's plan – so it seems that this subsidence has occurred since the dun was built, and has carried away some of the wall. The plan now appears to be a more straightforward C-shape.

Sources: 1. NMRS site no. NG 53 NW 5: 2. RCAHMS 1928, 181-82, no. 576 and fig. 256.

E W MacKie 2007