Hiram Farmer Wed Emily Field Li NY

Hiram Farmer is listed as a steam engineer; married Emily Field and had two sons, Albert and Epher.In 1870, the four were still alive;in 1880 Epher(11) was living with his relatives,Thos & Celilia Wells.Epher went on to become an engineer and as late as 1920, I found him living in Cranston, RI. He was a state boiler inspector, married to Lily and had one son. Albert.
I would like to find out what happened to the rest of his family.