Newman on Utilitarian Moral Theory

Reading Newman, The Tamworth Reading Room (1841) in preparation for teaching it later this semester. It's the most satiric thing I've read of Newman's, outside The Present Position of Catholics in England (1851), and that crazy chapter at the end of Loss and Gain--Part 3, Chap. 7 (1848). In the course of describing the Utilitarian view of the relation between knowledge and virtue, he says this:

"Mr. Bentham would answer, that the knowledge which carries virtue along with it, is the knowledge how to take care of number one--a clear appreciation of what is pleasurable, what painful, and what promotes the one and prevents the other."

Now, is it me, or is Newman the first to refer to the egoistic self as "Number One"? Is anyone aware of a prior such usage?