1867
19th
and
animal
animals
archival
archive
b&w
black
century
coal
collier
colliers
descend
descending
domestic
domesticated
down
drawing
drawings
fauna
harness
historic
historical
horse
horses
illustration
illustrations
industrial
industry
lift
lifting
lowering
mine
miners
mines
mining
nineteenth
old
pit
ponies
pony
revolution
shaft
strapped
transport
underground
white
work
worker
workers
working