Kenneth and Rollo were some time making their selection. They realized that their lives might depend upon the reliability of their mounts. Finally they decided upon two motor-cycles of British make, very similar to their own, although of an earlier pattern. Examination showed that the tyres were in excellent condition, and that with a slight overhauling the machines ought to prove most serviceable. There was petrol in abundance, more than was likely to be required during the impending operations around Antwerp. Having filled up the tanks of their motor-cycles, the lads started back to the lines, the sergeant being perched upon the carrier of Rollo's mount. The English lads were warmly welcomed by their new comrades of the motor section. Not one of the Belgian dispatch-riders who had taken part in the operations between Liége and Brussels was left. All of them had either been killed or wounded in the execution of their duty. Of the seven motor-cyclists now serving, one was in civil life an advocate, two were diamond merchants, a fourth a professor of languages, and the others railway mechanics. Yet, in spite of the great variations of social grades, the men were excellent comrades, united by a common cause. There were twenty ordinary cyclists as well, while the section also manned an armoured motor-car mounting a machine-gun. This travelling fortress had already gained a reputation as a hard nut for the Germans to crack. Up to the present they had not succeeded, while the machine-gun had accounted for several of the invaders. Kenneth and Rollo were not allowed to be idle. Eager to get to work again, they were taken in hand by a captain, who by the aid of a map pointed out the position of the various forts forming the outer and inner lines of defences. The lads had also to memorize the principal roads of communication between the city and the advanced works, as well as the chief thoroughfares and public buildings of Antwerp itself. Until they had a fair topographical knowledge they could be of little use as dispatch-riders, but, owing to the comparatively narrow limits of the Belgian forces, this information could be mastered after a brief concentrated effort. Major Planchenoît took good care to put the rejoined dispatch-riders to a practical test. Although glad of the help of the two British subjects, he was not an officer likely to employ them on important work until they knew the locality. Of their courage and sagacity he already had proof, but these qualifications were almost of a negligible quantity unless they knew the "lay of the land". Next morning the lads had their instructions.