I'll need to check mine as I've just started this line. I have her as Rosanna(h) Diggins 1852-1940 married to Robert George Snell.
then my lineage is from your Mary Anne's brother William (6 years younger) and he married Margaret Doodey).
I do have a Rose Hannah in my tree (1887 - 1956). But I have her as the youngest daughter to Rosanna Diggins and Robert Snell, born in Queanbeyan and then married to John VB Malloy.
As I said, I'm just starting the line. At the moment I'm looking for clues as to whether Robert Snell left Rosannah Diggins and went to Victoria, and whether she remarried (possibly William Blanch).
appreciate if you think I have something incorrect in my line.