Charles Winston, Archaeological Journal (1845)
“ Whenever a glass painting, although in other respects perfect, appears to bag, or bulge out in places, that is a symptom that its leading requires reparation or renewal. If the latter, the restoration ought to be most carefully conducted. The pieces of glass of which it is composed should be retained in their original positions, and the forms of the ancient lead-work preserved as much as possible. When the work is complicated, it is better to have it re-leaded by a regular glass painter, than to trust it to the tender mercies of an ignorant glazier ”
