Resources: Images of English Cathedrals before 1850

I have been recently working on sedilia in cathedrals and as an art historian, I enjoy little more than a game of spot-the-difference. Here are some resources I have found very useful for a glimpse of that state of our greatest medieval buildings before the Gilbert Scott-led frenzy of restoration mania. They are available copyright-free on archive.org so I could not help sharing them.