I am thinking of the original conflict of the Newton teaching being called heretical by Darby.
I seem to remember a pamphlet called Pro Vitae Sue. Perhaps you know how I can down load this controversy.

The book in question was not related to BW Newton but to Dr Newman. Its title:
"Analysis of Dr. Newman's Apologia Pro Vita Sua: With a Glance at the History of Popes, Councils, and the Church"
If you go to Google's advanced book search and type in "Newman's Apologia", it will take you to a download page.