"Fear Mr Salt has been arrested. He is in his motor-car, handcuffed, proceeding towards Guildford, in charge of man who has appearance of belonging to police force. Driver is not Mr Salt's man. Mr S. made opp. for me to see sit., but said nothing. Passed just W. of Puttenham 3.55. Roads good, but snow beginning. Car trav only 10-12 m. hour. Shall remain here on chance being use. Don't hesitate."
A hall-formed plan was already floating in the space between Miss Lisle's adventurous brain and the maps. The Puttenham message crystallised it. There was now something to go on. The route she knew already; the times and mileages also lay beneath her hand. The scheme had a hundred faults, and only one thing to recommend it--that it might succeed. For ten minutes she flung herself into the details of the maps, jotting down a time, a distance, here and there a detail of the road. "Puttenham" might remain at his box till dawn, but all the work, all the chance, was forward--before the car. At the end of ten minutes Irene picked up the accumulation of her labours and rang up the telephone exchange.
"What is it, Murphy?" demanded the inspector through the tube, as the car came to a dead stop. "Something else in the way?"
"I can't quite make it out, sir," was the reply. "We're just outside the long railway arch, and there seems to be something on fire towards the other end. Terrible lot of smoke coming through."
"This is an unusually long bridge--fifty or sixty yards, I should say. I hardly like to take you on into that smoke, sir."
"Oh, very well. Jump down and see what it is. Only be as sharp as you can."
It was now pitch dark, and a driving, biting storm of snow and hail was blowing across their path from the east. When the constable-_chauffeur_ had learned sufficient of the car to give him confidence, the storm had swept down, and their progress had been scarcely any faster. There had been delays, too. By Ripley a heavy farm waggon had broken down almost before their eyes, and it had been ten minutes before a spare chain horse could be obtained to drag it to the roadside. Further on some men felling a tree in a coppice had clumsily allowed it to fall across the road, and another ten minutes elapsed before it was cut in two and rolled aside. Fortunately they were not pressed for time. Fortunately, also, the driver knew the way, for few people were afoot to face that dreadful stream of snow and ice with the lashing wind and the numbing cold. Two, two or three, or perhaps four men had chanced to be at hand when the car stopped, making their way towards the bridge, but the wreathing snow soon cut them off. Occasionally, when the wind and drift hung for a moment, a figure or two showed dimly and gigantic in the murk of the tunnel. Nothing of the fire could be seen, but the smoke continued to pour out, and the mingled odour of burned and unburned oil filled the car.