The Mystery of Zogg

I'm reading a book right now about a woman who was lost as a child. The book is about how she and her granddaughter tried to solve the mystery of who she really was. It makes me think of the Mystery of Zogg. What I would really like to know is... what happened to Anna Knust Zogg? From the divorce proceedings, we know that she wasn't one for staying around the house cooking and cleaning (if you can take Mathias's word for it). But why would she leave her child to be raised by family members? Did she die? Did she run away? And where did she come from to begin with? We don't even know who her parents were.Was Knust her maiden name, or was she married once before Mathias? Did she marry again after divorcing Mathias? Did she have more children?

What we DO know: Anna Knust was briefly married to Mathias Zogg and had a baby girl named Flora Margaretta Augusta Zogg. And if she hadn't, I wouldn't be here.