following recommendations on this forum to get a copy of Sheffield Steel by KC Barraclough I noticed that some of the pictures were from a promotional leaflet produced by Thos Firth and Sons, and this led me to this high quality scan on archive.org.
In case you have not seen it, the leaflet contains dozens of additional photographs (undated, around 1900 according to Barraclough):
https://archive.org/stream/thosfirthson ... 8/mode/2up
In case you have not seen it, the leaflet contains dozens of additional photographs (undated, around 1900 according to Barraclough):
https://archive.org/stream/thosfirthson ... 8/mode/2up