All at once, terrible to relate, the head of the column of cuirassiers facing the English left reared with a fearful clamor. On reaching the culminating point of the crest, furious and eager to make their exterminating dash on the English squares and guns, the cuirassiers noticed between them and the English a trench, a grave. It was the sunken road of Ohain. It was a frightful moment,--the ravine was there, unexpected, yawning, almost precipitous, beneath the horses' feet, and with a depth of twelve feet between its two sides. The second rank thrust the first into the abyss; the horses reared, fell back, slipped with all four feet in the air, crushing and throwing their riders. There was no means of escaping; the entire column was one huge projectile. The force acquired to crush the English, crushed the French, and the inexorable ravine would not yield till it was filled up. Men and horses rolled into it pell-mell, crushing each other, and making one large charnel-house of the gulf, and when this grave was full of living men the rest passed over them. Nearly one-third of Dubois' brigade rolled into this abyss. This commenced the loss of the battle. A local tradition, which evidently exaggerates, says that two thousand horses and fifteen hundred men were buried in the sunken road of Ohain. These figures probably comprise the other corpses cast into the ravine on the day after the battle. It was this brigade of Dubois, so fatally tried, which an hour before, charging unsupported, had captured the flag of the Luxembourg battalion. Napoleon, before ordering this charge, had surveyed the ground, but had been unable to see this hollow way, which did not form even a ripple on the crest of the plateau. Warned, however, by the little white chapel which marks its juncture with the Nivelles road, he had asked Lacoste a question, probably as to whether there was any obstacle. The guide answered No, and we might almost say that Napoleon's catastrophe was brought about by a peasant's shake of the head.