Voyages to the House of Diversion 
Seventeenth-Century Water Gardens and the Birth of Modern Science


JUNE 2nd. to 4th. 2015 - HESDIN, THE QUEST FOR THE MARSH PAVILION

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As already noted, the medieval gardens and park at Hesdin in northern France were enormously important and are of particular interest because of the extensive water works and use of automata. Our second visit was occasioned by an invitation from independent documentary film maker Olivier Segard, whose previous work had included a movie about the medieval composer Guillaume Dufay (1400-1474), in order to contribute to a programme he was making about medieval gardens. It was clear from our last visit that the area immediately around the castle had been fairly comprehensively leveled by modern agriculture but there had been interesting surface indications of earthworks in a field in the northern part of the park along the line of the River Ternoise. This marshy location was generally reckoned to be the site of a remarkable construction known as the Marsh Pavilion which had been the centre for entertainment and hunting in this part of the park.  It is particularly well known because of a painting of what purports to show a wedding celebration in front of this edifice. Unfortunately this is an image with a complex history and one has to be excessively careful about taking particular features at face value.


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Could this be a picture of the Marsh Pavilion? Mariage de Philippe le Bon, Janvier 1430. Versailles collection MV5423




Prior to the filming we had agreed with the mayor of Le Parcq, M. Petit that he would help us with accessing the fields next to the river, last time we had only viewed them from the footpath. When we arrived at the mairie it was in the course of heavy restoration and M. Petit was summoned via mobile phone from his temporary office at La Poste. He very kindly came to meet us and took us down and out along the Chemin de St. Silvan. here we were met by M. Virny, the local farmer who was not only able to steer us clear of bulls but also give us special permission to walk out across his fields and follow the north bank of the Ternoise. He also gave us several interesting snippets of information concerning other remains in the valley.





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The route walked... clockwise.



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Discussions underway regarding our route.



The main point I wanted to investigate was where the Marsh Pavilion had been situated. The accounts from the late thirteenth and early fourteenth centuries had indicated it was close to a vivier or fishpond which had a paved bottom and which was partially blocked up stream and down stream by a barrier of branches to pen the fish in. there is some confusion, presumably created by an over reliance on the painting, as to whether or not the structure was built on piles in the pond itself. However, other references at the time suggest that there were ditches around the site that could be drained to facilitate repairs so it may have been moated.We do know that it was approached by a bridge across the river from the south which had been decorated with famous automata of nodding and waving monkeys clad in badger fur. Unfortiunately the entire complex had been burnt down by the English in 1355 and these features had not been replaced. Two commentators who had attempted to map the location of tfeatures in the park had varying interpretations. Lion writing in 1906 had placed it at the end of a route known as the Chemin de la Fontaine aux Dames and backing against a steep bluff to the north. Van Buren in developing his work placed the location further east.



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Hunt the Pavilion: Lion 1906 and van Buren 1983




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The first field we walked through had been ploughed and maize was sprouting, view looking south towards the Ternoise and here is the river bank actively being eroded, view looking east.




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View looking east on the north bank of the Ternoise at the                                                    Further along the river, looking south showing the widening of the river
point at which Van Buren suggested the Pavilion was located                                                at the point opposite to where Lion had suggested the Pavilion had been.




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View looking north towards where Lion suggested the Pavilion might have been with the bluff backing it.




Despite M. Virny's assurance the walk along the river bank was not without its challenges, apart from the bank itself eroding and the ground being very uneven in places we also had to contend with inquisitive / aggressive bullocks who were all too interested in our comings and goings. This resulted at one point in an athletic exercise to circumvent the place at which a fenced off area came right down into the water so the cattle could drink. Later on we had to drive them away so we could roll under the fence and make our way to the next section of the river bank. We pushed on a little further looking for traces of an earlier bridge which may have carried the Chemin du Roy across the river but the eventual location seemed a little too far to the west when we finally found it. When we were ready to cut back to the footpath we still had to wade through chest high nettles to reach it.




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Verna and M. Petit indulge in gymnastics  just before the bullocks arrive to protest.




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A section through the river bank at another cattle watering hole, view looking west



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Eroded pilings that may have supported an earlier bridge abutment, view looking west.




The final stage of our journey took us back along the Chemin de St. Silvan, a terraced trackway which was inhabited by delicious looking snails. The trackway itself was presumably ancient and was cut deeply into the valley side as we approached the point at which it dipped back down into the valley we were rewarded by a semi-aerial view of the ploughed field we had walked through an hour or so before. This revealed a couple of light patches of crushed stone linked by a greener band, this linear feature perhaps marking the course of an earlier channel or conduit. Given that the accounts write of the meadows surrounding the Pavilion being littered with pools and fountains this looked promising. We finished off pretty well back where we started but I hopped over a stile to take a closer look at the Trous sans Fond (Holes without bottoms / bottomless pits?) which were a group of linked springs that fed a stream which defined the northern margin of the ploughed field before making a right angle turn to the south to run into the Ternoise. Both Lion and van Buren suggest on their maps that this originally continued straight on eventually meeting the river further west but I could see no evidence of this on the ground.


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Looks almost good enough to eat.                                                                                   The walk along the Chemin de St. Silvan looking east.




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Our view looking south east across the valley with patches of stone and a linear feature.




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One of the bottomless pits, view looking south.



M. Petit was kind enough to invite us back to his house for refreshments before we got on the road to Lille with lots to think about. We had been invited to stay at Au Paravent, a guest house kept by Olivier and Isabelle his partner in the town of Roubaix just to the north of Lille. This was a wonderful place to stay, a historic house with period fittings and loads of character. The following day we had what you might describe as a script conference where Olivier explained what he was trying to achieve with his documentary and we thrashed out a plan for filming the following day before heading into Lille via the tram to see the sites. On Thursday the slightly delayed summer seemed to have arrived  and we drove down to the now familiar corner on the Auchy to Wamin road to unload. We did several pieces to camera on the high ground overlooking the valley then, with a nod to the dramatic, filmed my first view of the features we had observed from afar in the ploughed field.




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Unloading the car and thew talking begins somewhere on the Chemin de St.Silvan.



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The excitement mounts as compass bearings are taken prior to tracking out across the field.




The largest of the features spotted from the trackway was really quite impressive. It consisted of an area of chalk rubble (the local building stone) some of it clearly had been dressed or worked in other ways and a large amount of ceramic material. This seemed to be exclusively in terracotta and without a doubt some of it represented pipework whilst other fragments could have come from large vessels such as flower pots or planters. Unfortunately we had no easy way to date the material on the ground. It was certainly handmade, at least those pieces I picked up were but late thirteenth, fourteenth, fifteenth or even nineteenth century dates were all possible. It would have been really helpful to spot some undeniably medieval material here or anywhere else in the field but it was not to be had. There are two main possibilities here, either we are looking at the site of a late medieval fountain, destroyed and the remains scattered and shattered by the plough or else we have the location of a circular depression, possibly pool, which has been filled with debris from elsewhere any time up to the last century. Whatever the case it seems significant. The second scatter of stone was free of any evidence of ceramic pipe ware but did include fragments of dressed stone and one is reminded of the description of there being a small stone tower as the centrepiece of one of the garden areas next to the MarchP avilion. We took care not to remove any material from the site but would certainly like to see the local history group taking it on and perhaps seeing if they could organize some systematic field walking and recording for the site with the support of a local archaeologist. We also filmed next to the Ternoise where I examined a deposit of bricks and large pebbles at the confluence between the stream and the river. The bricks I fished out were handmade but did not look medieval.



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The larger circular patch of shattered stone, looking north and a detail of one of the shaped blocks and a selection of ceramics (Photos by Isabelle Baudelet )



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Verna stands close to the centre of the smaller scatter of chalk blocks, view looking north.




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Fishing for bricks and Olivier films atmospheric shots of the river running by.




All of this, plus dreadful traffic coming out of Lille earlier in the day, meant we were running a little late for lunch which we had at the CrÍperie of the impossibly picturesque Moulin de Maintenay. After lunch we shot further 'talking head' material as I attempted to fill in those parts of the story we had not covered out in the field.





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Gathered round the table for lunch followed by further thoughts on the gardens at Hesdin.




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The Moulin de Maintenay view from the south.





The question remains what conclusions can we draw from spending a couple of days in the valley of the River Ternoise? Back home I took a look at the material on the area on the excellent French Geoportail site. They had aerial photo coverage of the field immediately after ploughing which showed the linear feature and the larger stone patch very well plus a possible link to the springs to the north, there are a couple of other dark patches in the field which could repay exploring. rather alarmingly the next field to the west seems also to have been ploughed and appears to show absolutely nothing! This tends to put paid to van Buren's suggestion as to a location for the Pavilion although there is another possibility. I know from experience at Bordesley Abbey that water meadows when left untended can accumulate quite remarkable depths of silt through centuries of flooding. Is it possible that the features showing up are a quite late and that the medieval landscape is buried under a  metre or two of silt? Certainly the Cassini map from the eighteenth century shows extensive marshland to the south of the river. On the other hand I examined all those sections of river bank which had been cut into by the meandering river to a depth of up to 2 metres looking for traces of buried landscapes and found nothing.



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Aerial photo plus interpretation from the Geoportail web site




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The Ternoise valley from the Cassini map of the eighteenth century.




So to sum up, and the diagram below will help a little with this, from east to west:

  • The river has been canalized to the west of Auchy, this is presumably linked to the milling activity which are much in evidence in the village today and also shown on the Cassini map.
  • I could see no evidence on the ground for the vivier in the location suggested by van Buren who indicates that the northern margin of this pool is defined by the current curve in the river. It seems clear from the very active erosion that is going on that the river may have shifted its course significantly over the past few centuries. large quantities of medieval pottery recovered from further downstream and now in the museum in Berck opens up the possibility that some garden features may have been completely washed away.
  • Evidence from aerial photography and on the ground suggests we may have potential garden features to the south of the springs at Les Trous sans Fond. These need further examination
  • I could see no evidence on the ground to support either of the two suggestions for the site of the Pavilion, the lack of any indications of buried features on van Buren's site is especially concerning, nor is there evidence for an alternate route for the stream from the springs.
  • There are hints of widening of the river south of Lion's suggested location and the alignment with the Chemin de Fontaines aux Dames and the relationship with the bluff behind and the ancient Chemin de St. Silvan which seems to look down on the site could be significant
  • Local informants point out the location of bridge and suggest the former existence of a manor associated with the Chemin du Roy.


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