1) I don't get into other people's tree books. Are you interested in ancestral facts like possible parents of Jacob, even if he wasn't a military hero?
2) Rena....could you tackle this one? (Was Jacob Black married to Barbara Lark?). She may know the answer to that if the marriage occurred in Botetourt.
3) I don't have enough info to research this question.
4) Obviously given the date of birth, the Jacob Black of your link is not the Jacob Black who fathered Catherine. Not sure what your looking for in that question.