No member could be sure of the identity of any save himself.

Only two or three, perhaps, could have betrayed other members of the order." "Fool! were they not sure of Vergilius, the commander of the cohorts ?" said Herod.
"But the plot is uncovered, and now, great sir, I implore you, try the remedy of Caesar." Herod ceased muttering and turned with a look of inquiry.
"Forgive them," Vergilius added.
The king answered with curses.

Then from his chamber, where they had now arrived, he drove all save the young Roman.

"Long ago I discovered evidence of the treachery of the prince," said he.

"To Antipater--foul son of Doris--I despatched this letter." He spread a sheet of vellum before Vergilius, bidding him read.