It has been a long while since I worked on a black Southern U S family, so I forget most of the right terms, but you need to look for the Urquhart's plantation accounts books or whatever they are called. Sometimes the slaves are named, sometimes even birth dates are included. I wouldn't expect to find the father's name admitted to on the record, but there might be a Samuel in the slave side of household.
Somewhere there is a repository or list of repositories of where the various families' accounts books from each state have been donated to, I know I have seen the list, but again I forgot where.
One term I do remember is the Freeman's books. They are available online somewhere also. - records of dealings of recently freed slaves. The few I saw were usually filing complaints that they still weren't getting paid for their work. Samuel might be listed in them for some reason.
The US censuses for the relevant years record the # of free whites, but in the far right columns they are supposed to record the # of slaves as well.
all in all, I suggest finding this book:
Black Roots: A Beginners Guide To Tracing The African American Family Tree
by Tony Burroughs
which included this quote, badly paraphrased: 'at some point your family history becomes the history of the slaveowner's family', which is why you have to do the slaveowner's family as thoroughly as you would do your own.
It is great for research back to c. 1865 and then points you in the right direction before that.
