It is hard to make a comment without knowing more about the mother;s history. The fact that she owned journals is that she meant to say something. The fact that she didn't write anything tells me that either she has not much to say or that she was not confortable saying it. For me silence works when there is a person to share the silence with. When the journals are empty I can safely assume that she didn't have the courage to sharemit. When you leave it up to people to figure out things, we the people usually mess up the interpretation of the stories. You must be clear when you want to say something, otherwise others will end up saying things you might not intended to say.
More information about text formats