Historic Churches 2019

BCD SPECIAL REPORT ON HISTORIC CHURCHES 26 TH ANNUAL EDITION 17 Internal algal growth, an indicator of regular wetting Deterioration of the lead matrix (as in this case) or bowing of panels is typical of stained glass in south-facing elevations as it is regularly exposed to extremes of temperature. The glass, support bars, ties and guards were all found to be original. The windows were removed and carefully conserved before being reinstalled. We fitted small stainless steel plates, powder-coated black to the bars at the panel divisions to help support the weight of the panels. Nave north windows : two windows designed by Eleanor Vere Boyle and made by Willement. Affectionately known as EVB, Eleanor, was the wife of Richard Cavendish Boyle, the rector for some 40 years and son of the 8th Earl. She was a highly accomplished artist and illustrator and the instigator of the 1840s restoration. Early in her married life she illustrated two successful children’s books. She used income earned from these books to pipe water to Lower Marston, to replace the roof of St Leonard’s and to pay for these two windows. The deterioration of these windows was typical of north-facing windows, especially those made in the 19th century. Although very similar in their construction and installation to the three south-facing windows, the lead matrix was found to be sound. The main issue was paint loss as a result of prolonged wetting from condensation due to the windows’ northerly situation. East window: a celebrated collection of 16th-century glass from Flanders and the Rhineland, extensively described by Michael McGarvie in the church’s guidebook, by Cannon Christopher Woodforde in his book Stained Glass in Somerset , and by Nikolaus Pevsner. The collection is believed to have been given by the 8th Earl of Cork for the 1840s restoration. Although the windows were found to be structurally sound, having been re- leaded since their installation, there was corrosion to both faces of the glass. Decision making As stated earlier, it is often desirable to allow a period of environmental monitoring before installation of an EPG system to confirm its need. Where Detail of a window by Eleanor Vere Boyle and made by Willement showing loss of 19th-century painted detail typical of a north elevation window a large complex environment is being investigated such as a cathedral, with adjustable heating and ventilation regimes and staff on hand to implement any variations, there is potential to learn much from environmental monitoring and to save money by altering the environment rather than installing EPG.