Roman Imperial Coinage, Volume IV Part I: Pertinax to Geta; the antoninianus of Caracalla

evidence

Caracalla introduced the antoninianus, tariffed at two denarii but containing substantially less than twice the silver, and raised legionary pay. The numismatic record supplies independent physical support for the fiscal pressure that Cassius Dio says motivated the citizenship edict - though pressure is a context, not a proof of motive.

A evidence is not a place. Drawing it on a map would assert something about the world that no stored fact supports.