The evacuation of the Baldock-Saffron Walden position could not possibly have been carried out in good order on such short notice, had not Lord Byfield previously worked the whole thing out in readiness. He could not help feeling that, despite his glorious victory on the ninth, a turn of Fortune's wheel might necessitate a retirement on London sooner or later, and, like the good General that he was, he made every preparation both for this, and other eventualities. Among other details, he had arranged that the mounted infantry should be provided with plenty of strong light wire. This was intended for the express benefit of Frölich's formidable cavalry brigade, which he foresaw would be most dangerous to his command in the event of a retreat. As soon, therefore, as the retrograde movement commenced, the mounted infantry began to stretch their wires across every road, lane and byway leading to the north and north-east. Some wires were laid low, within a foot of the ground, others high up, where they could catch a rider about the neck or breast. This operation they carried out again and again, after the troops had passed, at various points on the route of the retreat. Thanks to the darkness, this device well fulfilled its purpose. Frölich's brigade was on the heels of the retreating British soon after midnight, but as it was impossible for them to move over the enclosed country at night, his riders were confined to the roads, and the accidents and delays occasioned by the wires were so numerous and disconcerting that their advance had to be conducted with such caution that as a pursuit it was of no use at all. Even the infantry and heavy guns of the retiring British got over the ground nearly twice as fast. After two or three hours of this, only varied by occasional volleys from detachments of our mounted infantry, who sometimes waited in rear of their snares to let fly at the German cavalry before galloping back to lay others, the enemy recognised the fact, and, withdrawing their cavalry till daylight, replaced them by infantry, but so much time had been lost, that the British had got several miles' start.