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.
Viņiem bieži nācās rāpot uz ceļiem garās, horizontālās ejās, kas izcirstas ogļu slāņos, kuru biezums vietām tik tikko pārsniedza 70 centimetrus.