Propaganda. Sure, it's a collection of horrors which took place under slavery in the South by wicked masters, but these collections of stories were the exception, not the rule. Many northern men beat their wives to death, killed their children, abused their poor labourers -- sometimes even killing them (things which were unheard of in the South), but this didn't prove the institution of marriage, parenting, and employer were inherently evil. This is the case Mrs. Stowe attempts to make with this book. She knew she lied in her work of fiction "Uncle Tom's Cabin", so she released this book later to try and justify her lies. To find a few hundred cases of abuse amongst the millions of slaves that existed in the South is not a great task and only proves that evil men exist -- which all already know. Mrs. Stowe was a propagandist and accuser, and she had never travelled to the South to see how it was first hand; as most northerners never did.