Achnasoul and Medieval Earthwork Castles in Ross Revisited

by Meryl Marshall

The moated homestead in Achnasoul Wood (NGR NH 48808 51821 Canmore ID: 274702 Highland Council (HC) HER MHG29192) 4kms west of Muir of Ord was visited by NOSAS members on a winter walk in February 2020 just before “lockdown”. The visit renewed my interest in the medieval period in this area and I began some research into the two homesteads of Davids Fort and Achnasoul with the intention of producing a blog for the NOSAS website. It wasn’t long before I realized what a complex topic I had taken on so I decided to split it into two; the first part, on Davids Fort, appeared on the NOSAS website in May 2020, this piece, focusing on Achnasoul, is part two.

The eastern half of the site showing the ditch and double banks with the mound on the right – looking SE

The Achnasoul site is a ringed earthwork with a central mound which was originally interpreted as a “moated homestead” but recently confirmed (on Canmore) as a motte and bailey. It is remarkably well preserved and has been one of my favourite local sites for many years. NOSAS carried out a planetable survey on a cold, wintery day in 2005 (report on NOSAS website at: www.nosas.co.uk/siterecords.asp.) The site remains something of a mystery and seems out of place; clearly it is fortified as it has substantial double banks enclosing a ditch but yet it is situated in low lying ground with higher knolls surrounding it – not a particularly defendable position!

In 2017 the site was scheduled by Historic Environment Scotland (HES) – SM13629. The description in the scheduling document says:               

The monument is a large earthwork enclosure comprising a ditch and two concentric banks which enclose a sub-circular area measuring around 43m northwest-southeast by 39m northeast-southwest within which is a raised mound. The ditch defining the enclosure measures 4m to 5m in width and 1.5m in depth and is broken by two causeways on the northwest and southeast. The outer bank of the ditch is complete and varies in height, reaching a maximum of 2m… Internally, the raised mound lies in the northern part of the enclosed area and is c25m diameter at its base, reaching a maximum height of 2m. The summit is encircled by a fragmentary bank, which encloses an area of around 11m diameter.

The size and form of the visible remains… represents a rare survival of a moated homestead of medieval date.

A processed image of the Achnasoul site from a lidar survey (contains public sector information licensed under the Open Government Licinse v3.0)

Castle Hill “Henge” at Muir of Ord – A Controversial Structure

by Roland Spencer-Jones

Muir of Ord Golf Club may be unique in having a green on top of a scheduled ancient monument. Castle Hill, the 13^th green, is an artificially modified mound, standing at the north end of a ridge, proud of the surrounding flat ground. Its perimeter is delimited by a raised bank inside of which is a circular ditch, with two gaps at NW and SE. This bank and ditch enclose an oval flat area approximately 28 m by 21 m. The ridge probably represents an alluvial glacial moraine before the end of it was subsequently modified.

There has been considerable discussion and debate in the archaeological literature over the last 350 years as to the nature of this feature, when it was created, and for what purpose. However, whatever its nature, it is special, recognised as such by being included in the list of ancient monuments in Section 12 of the Ancient Monuments Consolidation and Amendments Act 1913. This important act of scheduling was reported to the Right Honourable Lord Lovat in a registered letter dated 11th April 1957. In the scheduling documentation^[1] it was called Castle Hill Fort or Henge. Scheduling is the process that “identifies, designates and provides statutory protection for monuments and archaeological sites of national importance”, with damage to a scheduled site potentially incurring criminal charges. This became relevant in the early 1980’s, see later.

Castle Hill in 1972 © Historic Environment Scotland: John Dewar Collection

Early Descriptions of Castle Hill

The first historical mention of this prominent feature was towards the end of the 17^th century in a massive volume of archaeological recording, the Monumenta Britannica, written by probably Britain’s first archaeologist, John Aubrey (Aubrey, 1665-93). In it, Aubrey records part of a letter he received in 1692 from a Dr James Garden, Professor of Theology in the King’s College at Aberdeen. Aubrey had written to many local dignitaries and antiquarians throughout Northern Britain asking for information about stone monuments. He was delighted to receive this full response from Dr Garden in which the latter refers to a sacred grove thus: “I … have gotten information of two groves yet standing which are reputed sacred. One of them (which stands near to a place called Taradale in the parish of Killernen and shire of Nairn) is enclosed with a trench or dry ditch having two entries to it where the ditch is filled up or rather the ground has never been broken: all that live near it hold it as sacred, and will not cut so much as a rod out of it: my informer adds that, hard by, there is a cornfield where he conjectures there has been one of the Monuments, because in it there are several big stones such as those Monu­ments use to consist of, fallen down and out of order.” Taradale, now Tarradale, is the name given to the settlement that later came to be called Muir of Ord once the railway arrived in 1862. Garden’s description of the “sacred grove” fits nicely with the structure now called Castle Hill. Also note the description of standing stones in the vicinity, which we will come on to later.