Llwyn Celyn reveals more secrets

One of the joys of restoring historic buildings is that you never stop learning more about them, even when you think you have explored every joint and surface. Landmark’s Historian Caroline Stanford describes the latest revelations to emerge on site at Llwyn Celyn.


From the outside at least, Llwyn Celyn is at last starting to look habitable, as visitors explored it on our recent open day for locals.

A date for Llwyn Celyn

Landmark has been involved with the site at Llwyn Celyn for more than a decade, so you would have thought by now that we had discovered all there was to know. But yet again, a Landmark project has kept its best secrets almost till last, only yielding them up when restoration works are very well underway. Two amazing pieces of new evidence have emerged at Llwyn Celyn in recent weeks that justify still further our commitment to saving this extraordinary house.

Stylistically, we have so far judged that Llwyn Celyn was probably built around 1481. This was doubly plausible since this was when Llanthony Secunda in Gloucester made a reverse takeover bid to absorb its original mother foundation, Llanthony Priory in Wales.  In 2016, we commissioned conventional dendrochronology (or tree ring analysis) from Dr Dan Miles of the Oxford Dendrochronology Laboratory. We were disappointed, but philosophical, when this failed to yield a date fix at Llwyn Celyn, because the timber was all too fast grown to provide distinctive ring width sequences for matching against the reference chronology database (in other words, rainfall levels were such that the trees generally grew happily, and so without distinctive ring widths due to climate stress).

Then earlier this year (2017), Dan suggested to us that we submit samples from the timber cores already taken at Llwyn Celyn to Professor Neil Loader’s team at Swansea University, who are undertaking a Leverhulme Trust-funded research project  in partnership with The Oxford Research Laboratory for Archaeology and History of Art, and the Oxford Radiocarbon Accelerator Unit.  The UK Oak Project is developing a ground-breaking technique using the chemical signature of oxygen isotopes in tree rings to date timber samples with the same precision and accuracy as conventional dendrochronology. This is especially useful in situations like that at Llwyn Celyn where ring widths do not prove distinctive in their own right.

Ross Cook of Archaeodomus drilling a timber core from the rear kitchen bressumer at Llwyn Celyn.

Two of the Llwyn Celyn samples with intact sapwood and bark edge were identified as suitable for analysis. As this was the first time this experimental technique had been used on a hitherto undated building, the project team asked us to commission radiocarbon dates (or Carbon-14 analysis) on the same samples as independent verification. Radiocarbon analysis typically provides date spans too wide to add much to a building’s story, but this time we were happy to agree, thanks to a small amount unspent in our dendrochronology budget (part of our Heritage Lottery Fund grant on the project).

Simple timber cores like these can hold the clue to a building's age under conventional ring width analysis - but only if they include 50 or more rings and the bark edge. At Llwyn Celyn, we struggled to get enough rings in a single core because most of the timber was 'complacent' - it had grown too quickly.

Thrillingly, the oxygen isotope analysis has provided statistically robust results for felling dates of winter 1418/19 for a principle rafter in the solar roof, and winter 1420/21 for a joist at the service end of Llwyn Celyn. Both sampled timbers are unequivocally in their primary build positions. As further validation, the stable oxygen isotopes material from specific tree rings were then submitted for radiocarbon dating – which provided a very narrow date range of 1407-28 (with 95.4% probability).

Oak was used unseasoned in construction, so these results now allow us to say with confidence that the main house at Llwyn Celyn was built c1420, making it one of the oldest surviving domestic buildings in Wales and still further vindication of Landmark’s determination to save this important building.

This graph reveals the confidence of the winter 1420 felling date against the wider oxygen-isotope database. © UK Oak Project.

We also finally have a firm date to research in pursuit of the still unanswered question of ‘who built Llwyn Celyn and why?’ 1420 falls at the end of a period of huge disruption in Wales and the Marches, after the Black Death and further pestilence in the mid- to late-14th century, and then widespread devastation from 1400-1415 during Owain Glyndŵr’s rebellion.

Reconstruction followed on of course, but Llwyn Celyn was built intriguingly early in that process. Llanthony Priory, on whose lands its stands, is said to have been sacked by Glyndŵr in 1405-6. Documentary records are scarce for this period: we have commissioned further documentary research in the hope of finding out more. We’re also hoping that our project contingency budget might allow us to do some more oxygen isotope and radiocarbon analysis on other parts of the building, like the rear kitchen, chimney stack and even the outbuildings.

A hidden doorway

The second discovery is that of a blocked, pointed stone arch in the south wall of the high end of the hall. This was hidden between a combination of very early plaster that we were (and are) loathe to disturb, and crude 20th-century cement repairs. It was in removing the latter that the arch was revealed. Preliminary investigation by our project archaeologist Richard Morriss has proved that this was a doorway with a couple of steps leading up to it, and that it led through (rather than within) the wall, almost certainly to a narrow staircase up to the first floor chamber in the solar range. The stonework of the arch even bears extensive traces of yellow ochre limewash – our first discovery of an early 15th-century surface finish in the building.

The pointed stone doorway at the high end of the hall at Llwyn Celyn.

The presence of such a staircase underlines yet again that Llwyn Celyn was built for a person of very high status. We shall look out for signs of the footings of a lost external structure, whether stone or timber, as we excavate externally to install French drains in the probable area of the staircase, and also carefully explore the early internal plaster in the first floor chamber where the staircase would have emerged, to see if we can find traces of a corresponding doorway above. Llwyn Celyn may yet have more to reveal….

And who built Llwyn Celyn? Who had the wealth and the willpower so soon after a period of such devastation to impose their presence onto the mouth of the Llanthony Valley with a house of such presence, solidity and embellishment? We’ve speculated so far that it might have been a prior’s house (yet the priory was in disarray throughout the 15th century); or a rich yeoman farmer’s house (but who would have had the money so soon after the devastations of plague and Glywdŵr, when land returns plummeted with no one left to till the fields?) Or could it have been the steward of a rich Marcher lord, at a time when, according to historian R. R. Davies, ‘never had there been such an earthquake in the map of the lordships of Wales’?

My favourite theory so far came from a very knowledgeable member of the local history group we started five years ago now:

‘At the Battle of Agincourt in 1415, there was a Welsh archer called Daffyd Elisedd and he took prisoner a wealthy French knight, whom he ransomed for a princely sum. When he returned to his valley, Daffyd built the house he always dreamed of, complete with blank shields for the bearings he felt sure would come from his lord after his prowess at Agincourt…’

‘REALLY?’ said I (ever gullible).

‘Well, not that…’ he said, ‘but something like that….’

Llwyn Celyn: To Be Continued….

Learn more about Llwyn Celyn

Supporters of Llwyn Celyn

We are hugely grateful to those who have already supported Llwyn Celyn, including:

Guardians: 
Sir Hugo and Lady Brunner, Dr and Mrs J Bull, The Hon Elizabeth Cayzer, Mr R Eaton, Mrs F Fairbairn, Dr and Mrs J Gibbs, Mr C P Giles, Ms J Graham, Dr C Guettler, Miss J Hodgkinson, Mr and Mrs S Jordan, Professor R Mayou, Mr M Power, Mr G Ruthen and Mrs S Andrew, Mr B Sealey CBE

Patrons and other generous individuals: 
Mr R Burns, Mrs M Haddow, Mr D Giles, Mr and Mrs M Gwinnell, Mr and Mrs C Hutt, Mr and Mrs G Kingston, Dr C Mitchell, Mr A Murray-Jones, Mr C Nugent, Mrs P Parker, Mr D Purcell, Mrs H Quarmby, Mr and Mrs D Quartermaine, Mr T Reid and Ms L Ambrose, Mrs P Spens, Mr Oliver Thomas, In Memory of Andrew Murray 

Charitable Trusts and Statutory Grants: 
The Architectural Heritage Fund, Aurelius Charitable Trust, The Viscountess Boyd Charitable Trust, Brecon Beacons National Park Authority, Brecon Beacons Trust, Cadw, Country Houses Foundation, The Gunter Charitable Trust, Heritage Lottery Fund, John R Murray Charitable Trust, Scouloudi Foundation, ShareGift.