In the second (c. 30) and third books, (c. 1 - 40,) Procopius continues the history of the Gothic war from the fifth to the fifteenth year of Justinian. As the events are less interesting than in the former period, he allots only half the space to double the time. Jornandes, and the Chronicle of Marcellinus, afford some collateral hints. Sigonius, Pagi, Muratori, Mascou, and De Buat, are useful, and have been used.