There has been a disagreement over the evidence of Calpurnius Longus' life since Edmund Groag first set forth the facts of his existence in the last book he wrote, a prosopography of the proconsuls of Achaea.James H. Oliver, Review of Die romischen Reichsbeamten von Achaia bis auf Diokletian by Edmund Groag; Die Reichsbeamten von Achaia in spatromischer Zeit by Edmund Groag; American Journal of Philology, 69 (1948), pp. 434-441 The most recent investigation of his life was by Giuseppe Camodeca, who established a time line of his life up to his suffect consulship, which he dated to 148.Camodeca, "Una nuova coppia di consoli del 148 e il proconsul Achaiae M. Calpurnius Longus", Zeitschrift für Papyrologie und Epigraphik, 112 (1996), pp. 235-240 Unfortunately, Camodeca was unaware that Werner Eck had published a military diploma that securely dated Calpurnius Longus' tenure as suffect consul to 144. Accordingly, all dates taken from Camodeca's article for Calpurnius Longus' life below are adjusted four years earlier.
