E converso

E CONVERSO. On the other side or hand; on the contrary.

A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.
References in classic literature ?
Now this conversation in our historian must be universal, that is, with all ranks and degrees of men; for the knowledge of what is called high life will not instruct him in low; nor, e converso , will his being acquainted with the inferior part of mankind teach him the manners of the superior.