I agree that William Morton Radford was son of James Radford, but I can not clearly say that Nancy was his mother. In the 1850 Census of I believe Floyd County VA., it shows James - 30, Lydia - 32, Isaac - 6, Joshua - 4, No-name - 3. Going backwards I know that William was 39 when he married Victoria Wiseman. I have used this age to track back and in 1850, William would have been 3.
Don't know if this makes sense but I have tracked back since 1910. I could get no further than 1850 so we simply have to decide if Nancy or Lydia was Williams mother.
Please e-mail me as I am in contact with Alexandria Wiseman, who is a cousin and maybe between the three of us we will be able to put thisd thing together.