Shielhill South stood north-west of the Roman road on the climb from Ardoch towards Kaims Castle. Its entrance faced the road. Although the earthworks have been ploughed down, excavation has recovered a detailed picture of a timber tower within two ditches.
Visit Shielhill South
📍 Location: Shielhill South, Perth and Kinross. National Grid reference NN 8499 1150.
👁 What survives: A cultivated site with no standing tower or reliably visible earthwork circuit.
⭐ Best for: Rebuilding beside the Roman road.
🥾 Visit: The pin marks the archaeological site, not a parking place, entrance or confirmed walking route. Use existing appropriate paths, respect crops and neighbouring homes, and follow local signs and any forestry restrictions.
🏛 Explore nearby: Gask Ridge watchtower guide · Ardoch Roman Fort
Google Map location · Trove site record · HES scheduled monument record · Roman Gask Project
Approximate site pin, converted from the published National Grid reference (OSGB36 / British National Grid) to WGS84. Use it to locate the site, not its scheduled boundary. The reference is shown at approximately 10 metres precision; it is not a new survey.
Shielhill South at a glance
| Feature | Evidence and interpretation |
|---|---|
| Period | Usually assigned to the late first-century, Flavian Gask system; precise site chronology remains uncertain. |
| Remains | A cultivated site with no standing tower or reliably visible earthwork circuit. |
| Roadside position | North-west of the road; entrance towards the road. |
| Possible communication | Shielhill South → Ardoch |
| Garrison | The unit and number of soldiers are not securely known. |
The remains and their investigation
J. K. St Joseph investigated the site in 1973. The Roman Gask Project returned in 1996 to clarify the earlier work. The later investigation showed that the enclosure was not a perfect circle: it had a rounded, roughly rectangular outline, with an overall diameter around 24 metres. Four unequal sides, approximately 3.1–3.7 metres long, defined the tower's post-built ground plan.
The post settings preserve evidence for at least two structural periods, with burning associated with the later structure. That sequence is more useful than a simple picture of a tower built once and abandoned. The authors considered whether refurbishment took place during a continuing occupation, or followed a shorter interruption; the excavated evidence does not supply a precise elapsed time.
A fragment of Roman bottle glass was recovered from the ploughsoil. Its broad date offers support for an early Roman context, but its disturbed position prevents it from securely dating either building phase. No named unit or fixed number of soldiers can be assigned to the tower.
Watching the road
The nearby road linked the larger garrisons and the smaller posts. A watchtower gave soldiers an elevated position from which to observe traffic and the surrounding ground. The close spacing of these installations makes sense for surveillance as well as communication: recognising movement on a road is a different task from seeing a distant warning signal.
Modern trees, field boundaries and road surfaces are later parts of this landscape. They can hide both the earthworks and former sightlines. A modern ground-level view should therefore be compared cautiously with the possible outlook from a timber platform.
Shielhill South on the Gask Ridge
Possible communication with the forts
Woolliscroft’s visibility study places the known towers between Glenbank and Kaims Castle within view of Ardoch. A direct signal to the fort is therefore a plausible arrangement for Shielhill South. The diagram shows that proposed link, rather than a relay through every neighbouring tower.
These links depend on assumptions about tower height and visibility. Vegetation, weather and whether the installations were occupied at the same time also matter. Neither the diagram nor the surviving earthworks establishes a signalling code, a fixed watch rota or the size of a tower crew.
References and further reading
Trove: Shielhill South — NRHE 25404 — national site record, location and archaeological references.
HES scheduled monument record — SM3871. HES designation records are available through Trove.
Woolliscroft and Hoffmann: Shielhill South, excavations in 1973 and 1996 — report or source text hosted by the Roman Gask Project.
Woolliscroft (1993), Signalling and the design of the Gask Ridge system, PSAS 123, 291–313 — possible links and their limitations.
Woolliscroft and Hoffmann, The Roman Gask system fortlet of Glenbank, PSAS 139, 167–193, Table 2 — comparative roadside positions. Westerton follows its excavation report where the descriptions differ.
Read alongside the Gask Ridge watchtower guide and the guide to Roman forts in Scotland.
