Where did Cassius dio get his sources from about Anthony and Cleopatra?

We don't know for certain. Cassius Dio, like all the ancient writers, never mentions sources. We assume that he used other writers material and public documents in his research. The only ancient writer who vaguely mentions a source is Seutonius in his life of Nero.
We don't know for certain. Cassius Dio, like all the ancient writers, never mentions sources. We assume that he used other writers material and public documents in his research. The only ancient writer who vaguely mentions a source is Seutonius in his life of Nero.