Margaret Mary D'Arcy was my great grandmother. Daughter of James D'Arcy and Mary Sullivan (whom I look eerily simlar to), she married Joshua Leach Cox and had six children, one of whom is my grandfather. She passed in the mid 70's in Hot Springs, South Dakota.
I'd love any information about that side of the family. It's been difficult for me to find thus far.
Hope you still read this. Thanks,