But it was not easy to see this even with glasses. They had not become engaged until a little later than the others, but as they approached the river an equally terrible fire opened upon them. Being in comparatively close order, they suffered more heavily than Hildyard had done. Presently they came upon a spruit which they took to be the main river, and under a tremendous fire from the Mausers and guns, dashed across it, and swinging round their left made for the drift, sweeping before them a number of Boers who had been hidden in the long grass. Trenches were there line after line, but over these the four regiments--the Connaught Rangers, the Border regiment, the Inniskilling and Dublin Fusiliers-- dashed forward with such fury that the Boers did not stop to meet their bayonets. By a quarter-past seven the enemy had been driven across the Tugela. Without hesitation the Irish dashed into the river. Many fell headlong, for along the bottom barbed wires had been stretched. Worse still, it was found that instead of being two feet deep, as was expected, it was eight feet; for the Boers had erected a dyke across the river a little lower down, and had dammed the water back.