"You are quite right.

You are a more valuable asset to us than the charming lady who, I hope, will for many a day and year to come delight pleasure-loving Paris with her talent and her grace." "Amen to that, citizen," said Armand fervently.
"Well, it will all depend on you, sir! Here," he added, coolly running over some papers on Heron's desk until he found what he wanted, "is an absolutely unconditional certificate of safety.

The Committee of General Security issue very few of these.

It is worth the cost of a human life.
At no barrier or gate of any city can such a certificate be disregarded, nor even can it be detained.

Allow me to hand it to you, citizen, as a pledge of my own good faith." Smiling, urbane, with a curious look that almost expressed amusement lurking in his shrewd, pale eyes, Chauvelin handed the momentous document to Armand.
The young man studied it very carefully before he slipped it into the inner pocket of his coat.
"How soon shall I have news of Mademoiselle Lange ?" he asked finally.
"In the course of to-morrow.