Lots of good info on this Joseph Jenckes, who is one of my ancestors. Do a search on ancestry.com and check out my file, also lots of others. He was born in England, and joined his widower father, Joseph Jenckes, in Lynn Massachusetts. He continued the iron works established by his father.
Esther Ballard comes from a well documented family, too.
I read that the Teffts were ancestors of President Taft.