I wonder if you have found anything more on Benjamin Hughes.
Benjamin Hughes born 1817, Brynsiencyn. Anglesey died 1903 Columbus. son of Thomas & Margaret and husband of 1/ Margaret and 2/Ann Jones.
He emigrated in 1845
detail;s can be found from V66.10
details of 1st wife from V42.07

V = Y Cyfaill o'r Hen Wlad ( a welsh magazine in USA) eg Vol 1 -= 1838
so wife Margaret died about 1880
Hope this will help you.
All the best in finding more
G.