They were startled by the approaching rattle of arms in the corridor, and then a loud knock at the chamber-door. The next moment a soldier's head appeared in the doorway, to be quickly withdrawn with the exclamation, "It is true--here lies Apollinaris!" "One moment," said a second deep voice, and over the threshold stepped the legate of the legion, Quintus Flavius Nobilior, in all the panoply of war, and saluted the brothers. Like them, he came of an old and honorable race, and was acting in place of the prefect Macrinus, whose office in the state prevented him from taking the military command of that mighty corps, the praetorians. Twenty years older than the twins, and a companion-in-arms of their father, he had managed their rapid promotion. He was their faithful friend and patron, and Apollinaris's misfortune had disgusted him no less than the order in the execution of which he was now obliged to take part. Having greeted the brothers affectionately, observed their painful emotion, and heard their complaints over the murder of their slave, he shook his manly head, and pointing to the blood that dripped from his boots and greaves, "Forgive me for thus defiling your apartments," he said. "If we came from slaughtering men upon the field of battle, it could only do honor to the soldier; but this is the blood of defenseless citizens, and even women's gore is mixed with it." "I saw the body of the lady of this house," said Nemesianus, gloomily. "She has tended my brother like a mother."