Into the silent defile tore the first pair of cars, the gunners training their quick-firers in readiness to greet a possible but as yet unseen foe. Down into the hollow plunged the first car. Its front wheels dropped into the pitfall, and the next instant it toppled completely over. The second car tried in vain to pull up. The driver tugged at the steering-wheel; the heavy vehicle swerved, crashed into the wreckage of the first, and instantly burst into flame. The remaining cars, their occupants alarmed by the crash, halted. The road was too narrow to turn; to back at any rate of speed was impossible. The valley now echoed and re-echoed to the rattle of the mitrailleuses and the sharp crackle of musketry. The armoured cars were swept by a hail of bullets that killed or wounded every member of their crew, while the German horsemen were greeted with a devastating fire that threw them into disorder. Some attempted to advance against the unseen foe, others threw themselves from their horses and, taking cover, replied with a feeble and futile rifle-fire. The majority turned and fled in spite of the threats and efforts of the officers. Taking advantage of the confusion of their foes, the Belgian mounted lancers were ordered to charge. In grand style they cleared the intervening ground, and, although several saddles were emptied, rode dashingly through the broken ranks of the invaders. In ten minutes they were in possession of the field, with the bulk of the money captured at Tongres. "Ha!" exclaimed Captain Planchenoît when, an hour later, the two British dispatch-riders reported themselves. "What is the adventure this time? Have you delivered the message to the Burgomaster of Tongres?" "No, sir," replied Kenneth. "We had no chance to do so. The Germans have raided the town." "Peste!" exclaimed the Captain. "Have they burned the place? Did they seize the treasury?" "They did little damage, sir. They took the money with them, but our lancers ambushed them and recovered it." "Just like our intrepid cavalry," remarked the Captain complacently. "Well, you may go, messieurs. I do not think you will be required any more at present." But before the day was done both lads were required. An account of their part in the successful counter-operations had been sent to the Colonel of the 9th Regiment of the Line by the officer commanding the Belgian lancers, and in front of their comrades Kenneth Everest and Rollo Barrington were promoted to the rank of corporal. CHAPTER XII The Mail Escort During the next few days the Belgian field army had no respite. Landen was occupied by the Germans on the 10th of August, and strong cavalry screens of the enemy advanced along the Dutch border to within a few miles of the capital. Other large bodies of cavalry threatened the Belgian right wing, and in consequence a retirement of the small yet determined army was necessary.