Vintage work crew photos

[Toolmaker51]

Fullsize image: https://diqn32j8nouaz.cloudfront.net...s_fullsize.jpg

Child labor, abysmal conditions, virtually no safety precautions; https://en.wikipedia.org/wiki/The_33
I'm no advocate for modern unions; mining one of few deserving industries to receive their continued attention.

And I'll vote Hemmjo's comment that children SEE evidence what toils are. In fact, aspect could be attached to every topic of history at least.