That's a pretty well-attested type of person who existed back then, and Jack is my attempt to build the story of one such Vagabond. As for Eliza, she is someone who began life as a slave of the Barbary Corsairs, which may seem kind of outlandish to us now. But it is a fact that well into the eighteenth century the Barbary states in North Africa were routinely sending raiding parties up into Europe to snatch people off of beaches and take them back into slavery. Or they were overhauling ships on the high seas, seizing the cargo, and enslaving or taking hostage the people they found on those ships. So again, in the case of Eliza, I'm taking that whole class of people and trying to build the story of one individual.