It is difficult to identify children who were born in those decades before the census named everyone in the household. I went back to check Jonathan’s records in 1810, 1820, 1830 – there was more than one assumed son. I did not find Henry living in Rensselaerville in 1850 … but thought perhaps I had found him, with wife Jane and daughter Mary in Albany.
I searched around for more information on Henry and thought he seemed to be the one referenced as living in Albany and Hudson, NY, at times a banker, legislator and later referred to as a lawyer (somewhat of the “family business” for Jenkins). I stumbled upon death notices published both in Arizona and in New York (both Albany and Hudson) for a Henry who died suddenly in Tucson in Nov 1868 – saying he was from NY, had arrived in 1859 and “left family in Albany”. Was that him?