Still looking for info on my Bernhardt/Barnhardt/Barnhart line.

Charles Bernhardt said to be of French descent, married Elizabeth Campbell.
Son Charles Bernhardt/Barnhart married Clara Gillett around 1886. Charles died about 1900.
They had children Del (Adelbert/Delbert), Jessie, Minnie/Lois, Marguerite/Margaret.

I'm especially interested in finding what became of Marguerite.