Seems easy enough, simple and true: once you're free, that’s it--no going back. Free at last. Makes sense.
Well, not so. In the case of more than one slave and former slave, being free for a time, or having been free for months or even years, was not a ticket to ride because by law in these United States it was altogether possible and perfectly legal for a free man or woman to be returned to an owner and thus chained up once more, improbable as that may seem.