…there’s a window. Richard Marks is preparing for the British Corpus Vitrearum Medii Aevi a study of medieval wills that include glazing bequests. He has already amassed several hundred, primarily from published sources, and is looking for any unpublished wills in which glazing is mentioned.
If you have any information, please email Professor Marks. Sometimes it is uncertain whether a bequest is to the stonework or the glass, but such references will also be of interest. Sources of information will be gratefully acknowledged.