Please note that Mommsen uses the AUC chronology (Ab Urbe Condita), i.e. from the founding of the City of Rome. You can use this reference table to have the B.C. dates
When it is added that the author's
model and, so to speak, the only Greek historian familiar to him
was Clitarchus, the author of a biography of Alexander the Great
oscillating between history and fiction in the manner of the semi-
romance which bears the name of Curtius, we shall not hesitate
to recognize in Sisenna's celebrated historical work, not a product
of genuine historical criticism and art, but the first Roman essay
in that hybrid mixture of history and romance so much a favourite
with the Greeks, which desires to make the groundwork of facts
life-like and interesting by means of fictitious details and thereby
makes it insipid and untrue; and it will no longer excite surprise
that we meet with the same Sisenna also as translator of Greek
fashionable romances.(29)
