They would often crawl on their hands and knees in long drifts, or passageways, in horizontal coal layers that in some places measured just over two feet [70 cm] high.
Tihtipeale pidid nad roomama horisontaalsetesse kivisöekihtidesse rajatud pikkades kaeveõõntes, mis olid kohati vaid 70 sentimeetri kõrgused.