November 2022 – Castle Studies Trust Blog

A Window to Pontefract Castle’s Past

During the summer of 2022, Wakefield Council and Wessex Archaeology undertook several geophysical surveys of Pontefract Castle funded by the Castle Studies Trust. Ian Downes, Senior Heritage Officer at Wakefield Council explains what they found.

We were trying to discover if there were traces of the castle’s rich archaeology hidden under the ground. Specifically, we were looking for several service buildings between the kitchens and Royal apartments which had been mentioned in maintenance records for the castle, Victorian paths listed in ordnance survey maps, as well as any evidence of buried weaponry from the Civil Wars bombardment in the 17^th century.

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This was not the first-time surveys of this nature had been conducted, most recently West Yorkshire Archaeology Service were commissioned back in 2010.

*This image from the 2010 survey shows the resistivity results for the northern half of the bailey and two large but undefined masses of high resistance (ASWYAS)*

Three techniques have been utilised here: Resistivity, Magnetometry and Ground Penetrating Radar.

Resistivity measures the ability of the ground to conduct an electrical signal between two metal probes. In its simplest form this gives us a clue about buried walls and ditches, as the latter holds water much better than a wall and the resistivity is lower. This technique is relatively quick, easy and cost effective, but has limited depth and tends to only reveal that which is relatively close to the surface.

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Magnetometry, or to be more specific magnetic gradiometry, records tiny variations in the earth’s magnetic field. These could be caused by the filling in of a ditch, a fire or magnetic items in the soil. This again doesn’t have a great depth but can help backup findings from our other two techniques. The ability to spot iron objects on a Civil Wars site that was bombarded by cannon fire is also useful.

Our third method was ground penetrating radar. It uses a form of electromagnetic radiation similar to that used in radios, microwaves and mobile phones and employs the same technology used to detect aircraft. However, instead of sending signals into the air we direct them into the ground and measure how long it takes for those waves to bounce back. The signal bounces back better from solid objects than soil, so it can help spot buried walls or pits, and the time taken to receive the signal tells us how deep down they are

Results

We had varying success with the surveys. Unfortunately, outside the curtain wall, where we hoped to find Civil Wars evidence, the surveys didn’t show any clear results. There were more anomalies below the queen’s tower than elsewhere, but this may be the result of later landscaping works to accommodate the later road around the castle.

The resistivity survey however had more success. Here we can see evidence of the modern paths (pink) and the remains of an elliptical path in the northern survey area which matches the design of a Victorian path system, seen in an 1881 ordnance survey map. No images survive of these paths, so it is exciting to find some evidence of their existence beyond the original plans.

*Interpretation of the Resistivity results (Wessex Archaeology)*

The final survey technique, using deeper ground penetrating radar, shows a large grey area which is also seen on the resisitivity survey above. Its undefined shape and proximity to the surface suggests it is possibly rubble. However, it’s the dark orange feature about 1m down that is by far the most revealing.

*Ground penetrating radar results (Wessex Archaeology)*

For us, this was an exciting and unexpected discovery, as the design and shape of the structure, including the buttresses on the corners, closely matched a building seen on a 16^th century drawing of the castle by Ambrose Cave. He had been commissioned to survey the castle for Queen Elizabeth I in 1560 and it shows a number of buildings along the same section of curtain wall, including the small entrance porch, seen below with the elaborate pinnacles.

*Extract from Ambrose Cave’s Elizabethan Survey 1560*

We believe it shows a 15^th Century chapel that replaced the Norman Chapel which can be seen in the Eastern corner of the bailey. It was assumed from this drawing that it stood away from the curtain wall which can be seen in the background.

However, the design of its entrance closely matches the shape found in the radar survey, including the buttresses on the corners. Its possiblelocation now suggests that it was built against the curtain wall like the other buildings in the castle and was perhaps shown just forward of it for simplicity.

To have been able to finally locate this building and with such clarity and certainty is an exciting discovery for us. This new evidence adds to our knowledge and understanding of what used to be one of England’s greatest castles and will help to inform future interpretation of the site, provide a focus for potential future fieldwork and finally solves the mystery of where the 15^th Century chapel actually is!

We are extremely grateful to the Castle Studies Trust for their funding which allowed us to carry out the geophysical surveys. We also acknowledge the support of Wessex Archaeology and West Yorkshire Joint Services in the production of this article.

You can find out more about the project in our short videos which can be found on the Castle Studies Trust Youtube channel

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The Story Behind the Timber of Old Wick Castle

In five short videos Drs Will Wyeth, Coralie Mills and Hamish Darrah look at the project funded by both the Castle Studies Trust and Historic Environment Scotland to date a timber found at Old Wick Castle, Caithness, and in turn help us understand better this little understood castle.

In the first video Dr Will Wyeth gives the background to the project:

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In the second video Hamish Darrah gives more detail on the wood they found

While in the third one, Coralie Mills looks at how they dated the timber

In video four, Will looks at what the dating of the timber means:

Before summing up in video five about what the significance of the research is.

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Castle of Old Wick: The tale of a tower, a timber and time

In the first of two blog posts Coralie M Mills and Hamish Darrah of Dendrochronicle look at how they managed to test and date a piece of timber found in a wall socket of the tower at Old Wick Castle, Caithness. A second article by Dr Will Wyeth will look at the historical context behind these surprising findings.

A single surviving timber fragment in the ruinous tower of Castle of Old Wick in Caithness was recovered, studied and dated through the support of the Castle Studies Trust for this Historic Environment Scotland (HES) project. The outer end of the timber was visible within a socket in the north west wall of the tower at about second floor level. Exposed to the elements, in fragile condition and at risk of further decay, it was recognised by HES as a means of dating this relatively featureless tower, variously ascribed to the 12^th or later 14^th century for initial construction. Therefore, our mission to recover this fragile lone timber was rather nerve-wracking and undertaken very carefully. Fortunately, it went well, and we recovered it in one piece in September 2021.

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Inspecting the timber on site in September 2021 Photo: H Darrah 22.09.21

The weathered outer face of the timber before any intervention (Scale in 1cm intervals). Photo: H Darrah 22.09.21

Back at base we recorded the form of the timber and sub-sampled it for dating and species identification. The sampled cross-section had two centres and was intact to sub-bark surface in one corner. The species proved to be alder (Alnus glutinosa), a common native tree of wet places including in northern Scotland. This ruled out the possibility of dendrochronological dating, given the absence of suitable alder reference data, and led to Bayesian radiocarbon ‘wiggle-match’ dating using five-year blocks of rings sub-sampled at known intervals across the 80-year tree-ring sequence. The radiocarbon dating was undertaken by SUERC and Bayesian analysis of the only two viable sub-samples provided a ‘wiggle match’ date of cal AD 1515–1550 (95% probability), with highest single-year probabilities in the range cal AD 1515–1535 (68% probability). The results represent the bark edge position and the felling date of the timber. There is a possibility this is naturally storm-thrown material being used rather than a tree being felled for the job, in which case the date is the death date of the stem, but either way it is unlikely this stem was dead for long before it was worked.

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Radiocarbon ‘wiggle-match’ dating of the timber from Old Wick Castle, by SUERC. The result was based on two of three sub-samples; the outermost rings sub-sample was excluded due to possible historic ‘contamination’ while in situ.

This is a short irregular length of timber, 46cm long, 12cm wide and a maximum height of 19.5cm at the exposed face, tapering to 6cm at the inner end. The outer face is heavily weathered, and we cannot tell whether that face was worked or how far the timber projected originally. At the better-preserved inner end, the timber has an axe-cut notched, faceted face which had no structural function in the socket and was just sitting free within the void behind the timber. It has no clear joinery evidence such as a mortise or trenail. Therefore, our preferred interpretation is that the notched end is the consequence of axing off the branchy top of the stem, but we cannot rule out the possibility that it represents a re-used timber. If the notched end is seen as a deliberate feature, then it may have been designed to allow this timber to be propped against another element of a structure, perhaps in something temporary like scaffolding, and could signify re-use of the timber in this context. Other than this notched feature, the only other woodworking evidence is of an axe being used to shape the timber from the round into a rectangular form.

Above, record shots of the four side faces of the Castle of Old Wick timber. Black and white grid on scale is at 1cm intervals. Photos: Hamish Darrah 30.09.21.

Close up of the faceted, notched inner end.
Photo: Hamish Darrah 30.09.21.

Alder is often naturally multi-stemmed and can also be coppiced. However, eighty years is well beyond the stem age expected in any coppicing system. This is more probably natural unmanaged material. Based on the overall form, the double centre, the direction of knots and the taper on the timber, we do not think this timber is cut from a managed coppice stool or the base of a tree but rather from the upper branching top of a substantial stem. Therefore, the stem could have been a good bit older than 80 years when felled, as any tree stem will have more rings near the base than at the top. The stem must have been several metres tall after 80+ years of growth. Therefore, while we do not know how long the original timber was, this surviving short length of timber may be an offcut, with the bulk of the stem used for another purpose. Alder sill beams have been found in medieval Inverness and Perth, perhaps selected for alder’s rot resistant properties, and alder is also known to have been used as crucks historically in northern Scotland.

The socket holding the timber is much deeper than the timber, at least 70cm deep, with packing around the timber and a void behind, suggesting the socket was not built with the dimensions of this alder timber in mind and may be earlier than the timber, which would make the timber part of a secondary feature. Based on our observations of the timber’s position and character, it is clearly not part of a floor joist, and is more likely a fixture for a lost internal fitting or small structure. If the timber was used fresh in this context, our preferred interpretation, the dating results represent the time when this timber fixture was added to the castle. However, if the notch is interpreted as evidence of timber re-use than the date is a terminus post quem (date after which) for this phase of alteration to the castle. The structural and historical evidence is considered further by Will Wyeth in his separate blog piece:

Castle of Old Wick: Hot Fire and Cold Murder: Looting and Legitimacy in late medieval Caithness

Multi-stemmed alder trees in Sutherland, northern Scotland. Photo: C Mills.

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Castle of Old Wick: Hot Fire and Cold Murder: Looting and Legitimacy in late medieval Caithness

In the second of two articles on the Castle Studies Trust / Historic Environment Scotland co-funded project to date the timber left in a wall socket at Old Wick, Dr Will Wyeth offers an explanation for the surprising date of the timber.

Past investigations of Castle of Old Wick provide a context for the most recent research on this enigmatic Caithness castle. The archaeological evidence combined with historical details give sharp insight into an episode of violence and destruction at the castle in the life of Christian Sutherland, the Lady of Berriedale.

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Based on some similarities with Cubbie Roo’s Castle in Orkney, Old Wick’s standing fabric – a unornamented stone tower with small windows – has been dated to the 12^th century. A survey in 2016 led by Dr Piers Dixon of Historic Environment Scotland (HES) was the first comprehensive assessment of its standing buildings and earthworks since the publication of MacGibbon and Ross’s Castellated and Domestic Architecture in the late 19^th century. Dixon’s study queried the consensus of the castle’s high medieval origins, pointing to regional comparators whose documented history sat more comfortably in a date range beginning in the 14^th century. My review of archaeological and historical evidence for Castle of Old Wick in 2019 substantiated the conclusions of the 2016 survey.

Ground plan of earthworks and floor plans of stone tower, Castle of Old Wick, from 2016 survey. Copyright HES

Nevertheless, the simple stone towers of Caithness are poorly understood. They are fairly numerous in the county but our understanding of them relies on an unproductive mixture of simplistic architectural study and a reliance on references in historical sources.

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Dr Coralie Mills’ and Hamish Darrah’s research gives scope to uphold Dixon’s assertion, and challenge a 12^th century date for Castle of Old Wick. Their analysis of the fragment of alder has given the first substantive dating evidence for the castle with a felling date range of 1515-50 (95% probability).

Interior of the tower at Old Wick copyright HES

The slot in which the timber was recovered, located on an internal wall face within the tower, was argued by Dixon to be part of a hanging lum. This is a form of fireplace common to buildings of middling and high status in late medieval Britain, also helpful for dating the construction of the tower at Old Wick. A hanging lum is a fireplace whose hearth and flue are built against, not within, a wall.

Mills and Darrah suggest that the alder was a replacement for an earlier timber used for the same purpose, i.e. to support a hanging lum, therefore, the felling date corresponds with a period of repair, restoration or improvement of the interiors of Castle of Old Wick in the early 16^th century.

Looting and legitimacy

The historical context is one where violence both within and between kin groups is a feature of elite society in late medieval Britain. Typically, these disputes centred on rights of succession to property and titles. Those held by women were the most precarious. In 1517 two parties from the extended Sutherland of Duffus family met to settle a violent succession dispute at Drumminor Castle in Aberdeenshire. William Sutherland of Duffus agreed to an arbitration on the matter of assisthment (compensation for loss) and kynbut (compensation for manslaughter) with Christian Sutherland (the Lady of Berriedale) and her son and heir, Andrew Oliphant. William and his accomplices were held responsible for the murder of Christian’s elder son Charles. Duffus was also accused of seizing and looting two of her properties: Berriedale Castle and Castle of Old Wick.

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The family dispute which led to the murder of Charles Sutherland originated in the legitimacy of Christian’s inheritance of several estates on the death of her father, Alexander Sutherland (d. 1451×1471), including those in Caithness but also Duffus and elsewhere. William Sutherland’s father, also William Sutherland of the fittingly named Quarrelwood, contended that Christian was illegitimate. The court of the Bishop of Aberdeen had found in favour of Christian in 1494, but two years later Quarrelwood violently seized Castle of Old Wick. This was very likely not the same occupation mentioned in the 1517 document. Still unsatisfied, Quarrelwood pursued his case in the court in Rome for several years, until a settlement of sorts around 1507, when Christian surrendered her father’s Duffus lands.

Drumminor Castle, where in 1517 Christian Sutherland agreed to arbitration to settlement with her kinsman, William Sutherland of Duffus (copyright HES)

We don’t know exactly why she reached this settlement but it may be telling that her husband’s kin, the Oliphants, had spent substantial sums (not entirely selflessly) on supporting her legal case and accommodating Christian and her children during the difficult years of legal wrangling. We also can’t be sure if the 1517 document references this settlement, or another outburst of violence.

It is tempting to connect the episode of refurbishment at Castle of Old Wick implied by the radiocarbon dating and the documented evidence of looting at the castle which took place before the 1517 settlement, with the implication of subsequent repairs implied by that settlement. I think this is the best conclusion, but others are possible. Between 1515-50 the castle was held by at least seven different parties, but evidence suggests that they were either in financial difficulty or held the castle to generate money from its lands, not as a family seat. Only when the senior branch of the Oliphants take over after 1548 is there a compelling reason to think that the castle was systematically renovated: this is the best alternative scenario to that suggested above.

Archaeologists’ efforts over the last six years have drastically altered our understanding of the Castle of Old Wick. But they have also shed light on the story of Christian Sutherland and violence and upheaval occasioned by her kinsman’s legal contestation. This research demonstrates the value of revisiting the smaller castles of the world, for the potential to challenge an existing consensus as well as shed light on lesser-told stories from the medieval past.

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To read the first blog by Dr Coralie Mills and Hamish Darrah click here:

Castle of Old Wick: The tale of a tower, a timber and time