Accessing faultstring in Axis2 client

I have a simple question - how do I access the SOAP faultcode and faultstring in an Axis2 client?

The client code calls the web service operation and returns the response or throws an exception:
 
try {
stub.getPublication(pub, auth);
}
catch (WebServiceException wse) {
wse.printStackTrace();
}
 
I need to get the text in the <faultstring> element.  How do I do that?
 
Many thanks.
J