Leadwork, old and ornamental, and for the most part English (1893)
Lethaby, W. R. (William Richard), 1857-1931 · London, Macmillan · leaf 101
the forward panes being some or i 'inch in front of the plane of the inner ones and between them others are placed obliquely. This is best known in Holland, but a similar practice was followed at Levens in Westmor- land. Lozenges of lead pierced for ventilation, either one or several together, are… … Vm-..
Leadwork
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.