Dear M P GRIFFITHS

Sorry, but after spending 45 minutes replying to your message I got a 404 Error Message and when I went back to the previous page all the text was gone.

I very much appreciated your interest and comments but am well aware of the assumptions I have made. Until I am presented with something that refutes them I am, as I have done quite frequently in my research, suspending disbelief.

Regards,

Bernard

Brisbane, Australia