Accordingly the lancers were sent back, while a dozen of the cyclists were ordered to leave their machines at a wayside inn and to ride on the cars. From information received from various sources, there was every reason to believe that that part of the country was free from the attentions of the invaders, and no cause to doubt that the mail would be delivered in safety and with celerity. Again the convoy was set in motion, Kenneth and Rollo riding at a distance of about two hundred yards ahead, for their wish to keep an eye on one particular car had been abruptly nipped in the bud.
"We've seen the field of Waterloo at all events," shouted Rollo, in order to make himself heard above the noise of the motors. "But it's under different circumstances from those we expected."
They had had but a distant and momentary glimpse of the famous pyramid of earth surmounted by the Lion of Belgium. The ground that, less than a century before, was drenched with the blood of men of half a dozen nationalities was again being prepared for a similar object on a vaster scale. Belgian troops and peasants were busily engaged in digging trenches; for here, according to the expectations of military experts, was to be fought the decisive battle that was to save Brussels and Belgium from the Teutonic invasion.
At Quatre Bras the convoy struck the Namur road. A couple of miles farther on Kenneth's keen eyes detected a movement towards their left front. In double-quick time the lads dismounted and held up their hands, a signal that brought the convoy to a standstill.
"Cavalry, sir!" said Kenneth, pointing in the direction of a clump of trees.
"Our vedettes, without doubt," declared the Belgian officer, leisurely unstrapping his field-glasses. Before he could get them to bear, Kenneth was sweeping the country with his powerful binoculars. There was no mistake: the cavalry were Uhlans. They had already spotted the convoy, and were advancing at the trot to capture or destroy the weakly-protected mail escort.
Just then came a dull rumble at some distance to the rear of the line of halted cars. The enemy had blown up the railway bridge on the line between Charleroi and the north, thus cutting off the retreat of the convoy.
"Mon capitaine," exclaimed one of the cyclists who had been given a place in one of the cars; "I know this part of the country well. A kilometre farther on is a road to the right. It will bring us to Ligny."
The officer gave one glance towards the advancing Uhlans, now barely a mile and a half away.
"En avant!" he ordered.