Clutching at straws . Found a family in Nevada Township ,Nevada, California. The census has the family emigrating in 1885 and I also see a Beckerleg family close to them as well but I can't find emigration details of John and Jane The 1900,1930 and 1940 censuses have John 1879,Margaret 1880 which are the correct years of birth. The only difference is that husband John is John M instead of plain John and Thomas J instead of William Thomas. There is a son named William born in June 1886 in California. if his birth can be found it would at least,I hope,give his mother's maiden name.