[3] The entrance passage may have had a "guard cell", now blocked up, on the right side, just inside the door jamb.

[3] Excavations have revealed the postholes for internal timber buildings and in the 19th century there were said to have been radiating stone piers visible.

[2] In the 2nd and 3rd centuries AD a large wheelhouse was built within the reduced tower and with minor outhouses, storage pits and cattle stalls dug in the debris inside the older defences.

[2] In recent years Hamilton's schema has been challenged by archaeologists and others: the ring wall, blockhouse and broch are now usually assumed to be contemporary.

For a full account see B. Smith, 'How not to reconstruct the Iron Age in Shetland: modern interpretations of Clickimin broch', Northern Studies, 47, 2015.