@cstross the revolt of the American colonies in 1776 was does predate than the end of slavery in Britain in 1799, but Britain had a staged abolition, outlawing the slave trade in 1807 but with slavery in overseas territories remaining legal until 1833. That would cover British territories the Carribean (and elsewhere), as well as the 13 Colonies. I don’t know if individual areas outlawed slavery independent of the Slavery Abolution Act.
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