The blockhouse, probably built about 100 BC seems to be excessively large for the area that it protects, and so was perhaps more designed to impress rather than to defend. The blockhouse structure seems to have been built as an integral part of the defensive wall. The walls do not reach the edges of the cliffs on either side. There is no evidence that they once reached further and since have been shortened through natural or human activity. The ends are properly finished. It seems that the gaps were deliberate, and defense was not a primary concern. In fact, there are other points on the promontory that provide equally good natural defensive positions. There may be some similarity in this incomplete defensive wall with the forework of the
Broch of Clickimin, the
Huxter Fort and the
Crosskirk Broch. These works may be seen as prototypes that evolved into the
brochs that were later built in the islands and the Scottish and Irish mainlands. ==Gallery==