shadowplay
Winger
There is in War and Peace- the rich land owners talk about trading them for race dogs, Saluki’s.
Gogol's 'Dead Souls' is about a bloke who purchases the right to dead serfs still registered on the census to take out a loan against them as a get rich scheme.
Btw Durham miners were under bonded labour until the late 19th C which was similar but only set for year by year, iirc.