“It seems that I must follow,” he went on, angrily. “They have had the night to get ahead. Can we catch them?”

Labienus looked at the sun automatically, judging how many hours had been lost. His sour conclusion was that it would be near impossible, but he could not find it in himself to tell Pompey in that mood.

“At our best speed, eating on the march and without sleep, we should hit their rear before they are in the city,” he said. “Your new walls may slow them.” He paused to choose the right words that would not worry Pompey further. “Even if they reach the city, they will need time to replenish their supplies. We can deny them that.”

Labienus was careful to keep any hint of criticism from his voice, though he was privately appalled at the turn of events. Dyrrhachium was a key port on the coast and still the main store for the army in the field. Caesar’s legions should not have been allowed to make a strike for it. He knew some of the responsibility lay on his shoulders, but it profited nothing to dwell on past mistakes. The new position was not yet lost.

Pompey glared around him. “Then let us leave this barren place. Everything but food and water must come behind us at the best speed they can manage. The Senate too: they won’t stand the pace we will set.”

As Labienus saluted, Pompey mounted, his movements stiff with anger. He did not need to say that his family and the families of the Senate were in Dyrrhachium. Once Julius had them as hostages, his position would be immeasurably stronger. Pompey shook his head to clear it of hatred and fear. His stomach seemed to have settled as he made the decision, and he hoped a dose of chalk and milk would keep it docile for the day. His legions began to move around him, but he could no longer take comfort from their numbers.

Julius calculated the distance they had come, wishing he had the map in front of him. They had marched for twelve hours and the men were dragging their feet in the dust. Though they bore it grimly, some of them were staggering along and Julius had finally given the order to close up and rest an arm on the shoulder in front. It made them resemble invalids or refugees rather than legions of Rome, but every mile was one farther from the enemy behind.

“It should be in sight by now, surely?” Octavian said at his side.

Julius stared at him in silence until his younger relative swallowed and looked away. Julius squinted into the distance, searching for the first sign of the city. The sea glimmered silver to the west and that gave him hope that they were close. His eyes felt painful with weariness and he might have closed them as he rode, if the weakness would not have been seen.