How it stabbed his heart!  But he possessed the power to wound her in return.  Wild beasts should tear her fair body limb from limb, as she had torn his soul in this hour.

One wish alone filled his heart—­to see her whom he had loved above all others, to whom he had revealed his inmost soul, for whose sake he had amended his actions as he had never done for his own mother—­to see her lying in the dust before him, and to inflict upon her such tortures as no mortal had ever endured before.  And not only she, but all whom she loved and who were her accomplices, should atone for the torment of this hour.  The time of reckoning had come, and every evil instinct of his nature mingled its exulting voice with the anguished cries of his bleeding heart.

The prefect knew his master well, and watched his every expression while apparently listening to the voluble physician, but in reality absorbed in a train of thought.  By the twitching of his eyelids, the sharply outlined red patches on his cheeks, the quivering nostrils, and the deep furrows between his eyes, he must be revolving some frightful plan in his mind.

Yesterday, had he found him in this condition, Macrinus would have endeavored by every means in his power to calm his wrath; but to-day, if Caesar had set the world in flames, he would only have added fuel to the fire, for who could more surely upset the firmly established power of this emperor and son of emperors as Caracalla himself?  The people of Rome had endured unimaginable sufferings at his hands; but the cup was full, and, judging from Caesar’s looks, he would cause it to overflow this day.  Then the rising flood which tore the son of an idolized father from the throne, might possibly bear him, the child of lowliness and poverty, into the palace.

But Macrinus remained silent.  No word from him should change the tenor of the emperor’s thoughts.  The plan he was thinking out must be allowed to ripen to its full horror.  The lowering, uncertain glance that Caracalla cast round the tablinum at the close of the physician’s narrative showed that the prefect’s reticence was an unnecessary precaution.

Caesar’s mind and tongue still seemed paralyzed; but at that moment something occurred which recalled him to himself and brought firmness to his wandering gaze.

There was a sudden disturbance in the antechamber, with a confused sound of cries and shouting.  Those friends of Caesar who wore swords drew them, and Caracalla, who was unarmed, called to Antigonus to give him his.

“A revolt?” he asked Macrinus with flashing eyes, and as if he wished the answer to be in the affirmative; but the prefect had hastened to the door with drawn sword.  Before he reached it, it was thrown open, and Julius Asper, the legate, burst into the tablinum as if beside himself, crying:  “Cursed den of murderers!  An attempt on your life, great Caesar; but we have him fast!”