Hi all,
The Chances archive, specifically with regard to their stained glass, I think I have flagged up before, as being in the possession of our old friends Pilkington's at St Helen's...............
With regard to the production of lenses, for signalling, railways, (1845) admiralty use, indeed, political discussion as to whether Chances should open an optical glass factory in Czarist Russia in 1916, in the middle of WWI, hey go no further than the National Archives, the first place to look, that last that many do......
regards,
Marcus