Interesting that the author and his siblings had empathy for the servant. In most American Slavery stories the entire household, including young children, are portrayed as being evil and unforgiving towards the slaves. In these situations I wonder if there is any sort of innate feeling of compassion and decency and how that manifest itself in a culture where slavery and cruelty is the norm.
Yes, except as a full grown adult, the author never reported the situation to the authorities, took this 'secret' to the grave and even 'inherited' his slave from his parents. He said he paid her an allowance (which didn't sound like much) and also didn't make her work after she lived with them, but that's a token effort to right the injustice of decades of work without pay.
Also, he clearly didn't plan to take his secret to the grave, it's on the cover of the Atlantic.