Reinforcements for the enemy being observed arriving by train, still further to protect his exposed right, Graham sent a reserve company of the York and Lancaster in that direction. Near the same point a Krupp gun, taken from the enemy at Mahsameh and mounted on a railway truck, was brought into action, and worked by a detachment of Marine Artillery. This gun was admirably served and did great execution among the attacking force. Although fired upon by as many as four guns at a time, not a man of the gun detachment was hit, and the gun continued to fire on to the last, expending ninety-three rounds. The immunity enjoyed by the gun's crew was doubtless due to the constant shifting of the gun backwards and forwards on the line of rails. The gun itself was protected by a breastwork of sandbags. At 6.45 p.m. a general advance was ordered, with the object of closing on the enemy's infantry about the time that Graham reckoned Drury-Lowe's cavalry charge would be taking place. The advance was made very steadily, the British infantry firing volleys by companies, the reserves following in rear of the railway embankment. The Marine Light Infantry had now come on to the ground on the right and joined in the advance, which was continued for from two to three miles, the enemy falling back and only once attempting to make a stand. This was on the British left, but here the Egyptians broke at the first volley of the Marines. At 8.45 p.m. Graham heard of the cavalry charge from an officer of the 1st Life Guards, who had lost his way. Graham's force had now been marching forward for an hour and a half in the moonlight, and his men had had narrow escapes in mistaking detached bodies of the enemy for British troops. Fearing some mistake might be made, and seeing no further chance of co-operation with the cavalry, Graham ordered the troops back to camp. To describe the movements of the cavalry under General Drury-Lowe. According to that officer's report, the aide-de-camp despatched by Graham reported at 5.30 that the enemy was advancing in force, and the brigade was at once turned out. It consisted of the Household Cavalry, the Dragoon Guards, and four guns of the Royal Horse Artillery. As the troops advanced, the sound of heavy firing was heard, and, _en route_, a galloper from General Graham arrived, and stated that the General desired to say that "he was only just able to hold his own, and that he wished the cavalry to attack the left of the enemy's skirmishers." The sun had now set, and a bright moon was shining. The light, however, was not good, and the force had to be guided by the flash of the guns and musketry. General Drury-Lowe made a wide circuit, so as to turn the enemy's left, and the brigade arrived close to this portion of their line without being noticed.