Meanwhile the unforeseen resistance offered to the invaders along the line of the Meuse and neighbourhood of Liège was throwing the German military machine out of gear. In this initial stage of the campaign "the best organised army in the world" was like a powerful locomotive engine fitted with every mechanical device for rapid advance, but devoid of either brakes or reversing gear. As the 7th and 10th Divisions recoiled from the forts of Liège in something akin to disastrous defeat, congestion and confusion spread backward to the advanced base at Aix. Hospital trains from the front compelled other trains laden with reserves and munitions to remain in sidings. The roads became blocked. Brigades of infantry and cavalry, long lines of guns and wagons, were halted during many hours. Frantic staff-officers in powerful cars were alternately urging columns to advance and demanding a clear passage to the rear and the headquarters staff. No regimental commandant dared think and act for himself. He was merely a cog in the machine, and the machine had broken down. Actually, the defenders of Liège held up the Kaiser's legions only a few days, but it is no figure of speech to say that when General Leman dropped stupefied by an explosion in Fort Loncin he had established a double claim to immortality. Not only had he shattered the proud German legend of invincibility in the field, but he had also struck a deadly blow at German strategy. With Liège and Leman out of the way, it would seem to the student of war that the invaders must have reached Paris early in September. They made tremendous strides later in the effort to maintain their "time-table," but they could never overtake the days lost in the valley of the Meuse. What a tiny pawn was Jan Maertz in this game of giants! How little could he realise that his very existence depended on the shock of opposing empires! The communications officer at the cross-roads had not a moment to spare for many an hour after Jan's execution was deferred. At last, about nightfall, when the 9th Division got into motion again, he snatched a slight breathing-space. Remembering the prisoner, he detailed a corporal and four men to march him to Visé and make the necessary inquiries at Joos's mill. For Maertz's benefit he gave the corporal precise instructions. "If this fellow's story is proved true, and you find the man and the woman he says he brought from Aachen, return here with the three of them, and full investigation will be made. If no such man and woman have arrived at the mill, and the prisoner is shown to be a liar, shoot him out of hand." A young staff-officer, a lieutenant of the Guards, stretching his legs while his chauffeur was refilling the petrol-tank, overheard the loud-voiced order, and took a sudden and keen interest in the proceedings. "One moment," he said imperatively, "what's this about a man and a woman brought from Aachen? Who brought them? And when?"