Hi Martin,
I have one of the Mattinglys of Stanford in the Vale on my extended family tree, William Mattingly born abt 1839. I know nothing about his family since he is only a distantly connected by marriage.
Mattingly is not a common name, so I assume he was somehow related to your Anne. William died young (1865), leaving a wife and 2 sons. His widow remarried to one of my gg uncles and emigrated to Australia. It's just a thought, but perhaps Anne also went to Australia since she may had relatives there and a place to stay.
If you want to do any searching in Australia, I can give you details of where my gg uncle and family lived.
hth,
Carmela