"Tickets, please." The guard was at the door, and behind him stood a police inspector.

Crichton having given up his ticket, turned to the girl and said: "You have your ticket, Amy."

She handed it over.

"From Newhaven, I see." The inspector stepped forward:

"I must ask the lady to lift 'er veil, please."

"What do you mean, my man? Are you drunk?

"Steady, sir. Do you know this lady?"

"This lady happens to be my wife, so you will kindly explain your extraordinary behaviour."

The inspector looked a little nonplussed.

"Sorry to hinconvenience you, sir, but we 'ave orders to search this train for a young lady who got in at Newhaven. Now this is the only lady on board whose ticket was not taken in Paris. So you see we have got to make sure that this is not the person we want."