Marcus Tullius Cicero,
Letters to his brother Quintus…
“ By entering Rome he gave up his imperium and could no longer ask a triumph.↑ Caesar was accustomed to come to North Italy (Gallia Cisalpina) for the winter to Ravenna or Luca, and there he could be communicated with and exercise great influence.↑ That is, he would go to his province of Cilicia on the strength of his nomination or allotment by the senate. There was some doubt as to the question whether such allotment did not give imperium even without a lex curiata. Besides, the consul had already imperium, and he might consider it to be uninterrupted if he left Rome immediately. ”
