The artillery officers thought that the covering troops were insufficient, because aeroplanes had established the presence of large masses of hostile cavalry an attack from whom was feared. But reinforcements could not be had as there was a lack of troops for the moment. So we had to take up positions as well as we could. We dug shallow trenches to the left and right of the battery in a nursery of fir trees which were about a yard high. The machine-guns were built in and got ready, and ammunition was made ready for use in large quantities. We had not yet finished our preparations when the shells of our artillery began to whizz above our heads and pound the ranks of our opponent. The fir nursery concealed us from the enemy, but a little wood, some 500 yards in front of us, effectively shut out our view. We were now instructed in what we were to do in case of an attack by cavalry. An old white-haired major of the infantry had taken command. We sappers were distributed among the infantry, but those brave "gentlemen," our officers, had suddenly disappeared. Probably the defense of the fatherland is in their opinion only the duty of the common soldier. As those "gentlemen" are only there to command and as we had been placed under the orders of infantry officers for that undertaking, they had become superfluous and had taken French leave. Our instructions were to keep quiet in case of an attack by cavalry, to take aim, and not allow ourselves to be seen. We were not to fire until a machine-gun, commanded by the major in person, went into action, and then we were to fire as rapidly as the rifle could be worked; we were not to forget to aim quietly, but quickly. Our batteries fired with great violence, their aiming being regulated by a biplane, soaring high up in the air, by means of signals which were given by rockets whose signification experts only could understand. One quarter of an hour followed the other, and we were almost convinced that we should be lucky enough that time to be spared going into action. Suddenly things became lively. One man nudged the other, and all eyes were turned to the edge of the little wood some five hundred yards in front of us. A vast mass of horsemen emerged from both sides of the little wood and, uniting in front of it, rushed towards us. That immense lump of living beings approached our line in a mad gallop. Glancing back involuntarily I observed that our artillery had completely ceased firing and that its crews were getting their carbines ready to defend their guns.