Hi There,
Don't know if you are still out ther/interested in the bensons-but if you are can give you some later history as I have been investigating my wife's final history.
She goes back to James Benson-Peter's son born in 1828, who later moved to England to work as a miner in Staffordshire, married a jane and they had a biggish family. He died there in 1869 and his wife in 1897.
Did you ever find out about Peter?
Cheers