Swan Mine, Wiltshire - Any old pics?

[Patrick Houghton]

Ive been to swan mine a handful of times now and i'm planning on doing a school projecty type thing on the significance of mining around wiltshire.
Would be great if you guys had any old pictures to show how the mines changed over the years, i've had no luck with finding any old pictures online other than ones of the entrance where the door is a tiny bit more intact.
Thanks!