It has been six years since the query about Nancy Pulliam was posted. Has more information turned up in the meantime?
Here is a bit more about that Halifax County, Virginia, will. Will Book 1, page 264. I have 13 March 1778, but I failed to note whether that was the date of the will or when it was proved in court. James Pulliam left everything to his brothers and sisters as named. However, he named "my trusty and well beloved father Joseph Pulliam Senr." executor. The witnesses were Stephen Wade and Agnes Wade.