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| Weathered dolomite limestone crosses in the porch |
When writing my previous posts that briefly describe an unexpected visit to St. Helen’s church in Burghwallis, I essentially relied on 63 photographs that I took in the 13 minutes that I had spent walking around its exterior and the report by Peter Ryder in the publication Saxon Churches in South Yorkshire, which Historic England have relied on for their listing description.
Having just visited the Church of St. Mary Magdalene as part of Church Explorers Week, which also has a very interesting construction history, I immediately knew that I would also have to visit this church again in the not too distant future but, when Colin the churchwarden showed me the interior, I have to say that I was a bit disappointed to discover that all of the stonework is plastered.
Nevertheless, I was very interested to see that the reredos (1888) is made with dark brown veined alabaster, which is most likely to be from the village of Tutbury in Staffordshire and not Chellaston in Derbyshire, another former centre of alabaster production, which produced the white and very light brown veined variety until it ran out.
Realising that there wasn’t that much of interest to this Language of Stone Blog, I picked up the standard Heritage Inspired produced church guide, which informed me that the reredos, which was installed in memory of Anne Marie Peel who died in 1869, was originally plain alabaster but the figures were painted in the 1960’s.
The nave is paved with yellowish dolomitic limestone from the Cadeby Formation and, in the central aisle, large grave slabs that could be sandstone are set into the floor, but I didn’t inspect them closely and just took a photo from which I can make out a date of 1660 on the inscription.
According to Ryder, St. Helen’s church has a good collection of mediaeval cross slabs, with many other fragments set into steps, window sills and the general fabric, but I only noticed the slab with a brass figure in armour that is thought to be Thomas Gascoigne (d.1554).
Being very conscious that Colin had plans to go to Campsall, I just took a few record photographs of the nave and I didn’t investigate the details of the pointed arches to the chancel and tower, which are partally obscured by the rood screen and gallery respectively.
Pevsner refers to the rood screen in some detail but, as with many descriptions of other churches, his entry for St. Helen’s church is quite haphazard and doesn’t note many of its interesting features, including the font. Ryder thinks that the bowl may be C12, with the octagonal shaft being a C14/C15 alteration and the lower part of the shaft looking like it is Victorian.
Opening the south door and going into the porch, Colin showed me two old crosses that once stood on the apexes of the gables to the nave and chancel, which were salvaged when they were replaced during recent essential restoration to the church.
Burghwallis is set a long way from the Lower Don Valley, where the old steelworks were responsible for sulphurous atmospheric pollution, but these crosses show that although dolomitic limestone used for plain masonry is quite durable, the increased surface area of intricately carved masonry makes the stone susceptible to weathering by frost action.
The dolomitisation of the original limestone deposits that form the Cadeby Formation resulted in a reduction of its volume by approximately 12.4%, with the shrinkage leaving small crystal lined vughs and cracks (vents) that are not sealed with calcite and are open to penetration by moisture.
In his reference to the nave, Ryder considers that the south door is the only original opening in the walls of the original Saxon nave and that the “plain square-section jambs cut straight through the walls” is an indication of this.
He goes on to describe the details of the position of rebates, alterations towards the end of the mediaeval period and the presence of red sandstone in the imposts and voussoirs of the original Saxon doorway, but I only took a few record photos and didn’t inspect these.
After having a conversation with Colin about the financing of repairs to the mediaeval churches in the Diocese of Sheffield and thanking him for opening the church for me at short notice, I then went to have a closer look at the stonework of the tower.
Looking from the ground up the west elevation, thinly bedded dolomitic limestone from the Brotherton Formation is used for the walls and massive limestone from the Cadeby Formation for the quoins, window dressings and for the Perpendicular Gothic style parapet and pinnacles.
The narrow round headed windows of the first stage are said by Ryder to be of a conventionally C12 type, but he considers the belfry openings to be a puzzling feature in that their general form is pre-Conquest, yet the pointed arches are of a C13 Early English Gothic style.
As when quickly looking at the chancel and the nave, where a considerable amount of sandstone in various shades of red have been used for the base course and square plinth, quoins and in the herringbone and roughly squared and coursed masonry, I was most interested in the considerable proportion of moderately large sandstone blocks that are used in the tower.
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| Red and dark plum coloured sandstone in the tower |




























































