Hillyard chuckled as the attendant moved away.
"I am to be your watch-dog, am I?
Your sentinel?
Very well! Come, let me deserve your confidence, my friend." The train thundered out of the tunnel and through the suburbs of Paris.
Hillyard drew a letter from Fairbairn out of his pocket and read it through.
"Compartments numbers 11 and 12 on the night train from the Quai d'Orsay station to Cerbere.

Good!" murmured Hillyard.

"Here I am in compartments numbers 11 and 12.

Now we wait until the married couple from Perpignan and the attendant are comfortably asleep." He undressed and went to bed, but he did not sleep.

He lay in the berth in the darkness, listening intently as the train rushed out of Paris across the plains of France.