This paper examines the chronology of the Neo-Babylonian and Achaemenid Empires and weighs Martin Anstey's claim that the Ptolemy's Royal Canon includes 82 fabricated years of Persian history in order to fit an artificial Greek chronology invented by Eratosthenes. Methodology included review of the testimony of ancient chronologers, inscriptions, astronomical tablets and business tablets to determine if the Royal Canon's chronology can be reconstructed entirely from other ancient sources. We found that the Persian Chronology can be reconstructed from multiple ancient sources, and does not rely upon the Royal Canon as a primary source. We conclude that Anstey's assertions are impossible to reconcile with ancient records and modern astronomy.