I'd love to share informtion with you. I have marriage, children, and death for Lunda (she married into the line I am researching). Henry Allen went to Texas. John died in 1857, married (don't know wife's name) but no children (will in Stanly County), Sarah married John W Burris. I see that you commented on the birth date of George Manuel in Tennessee in 1910. Is this Henry's son? I have no info about Mary.
Henry is, as far as I can tell, the son of Henry Manuel,senior who was in Stanly County area by 1800. He had two other sons, Brittian and George, who moved to Texas. I don't think the Simeon (or Sim) is any kin. He is listed as a mulatto. He may be from the Sampson County Manuels who are part Indian. I'm not sure but I think Henry came from Stokes County or somewhere near there.
A lot of this may be speculation but some of it is fact. I'd love to exchange information with you.