A large number of the Bells and Hamiltons ended up working in the now derelict Woodmuir Colliery near Breich in West Lothian.
Thanks to the power of the internet, there is a selection of photos available here.
Here’s one of them, as an example;
If you would like to see more about coal mining in the Lothians then I would heartily recommend “Mining The Lothians” by Guthrie Hutton, which you can get on Amazon.
If you want to know about shale mining, which is what the Hamiltons did before they dug for coal, then try “Shale Voices” by Alistair Findlay. It’s also on Amazon, although not a particularly easy read. However, despite it being a huge industry, employing 10,000 people at its peak, it’s Scotland’s forgotten industry.