General Hamilton from the west approached Heidelberg on the 22nd, and exchanged shots with the Boer patrols; but during the night the enemy disappeared and the troops occupied the town. The force consisted of General Gordon's and General Broadwood's Cavalry Brigades (the 9th, 16th, 17th Lancers, and Household Cavalry, 10th Hussars, and 12th Lancers respectively), two batteries Royal Horse Artillery, two batteries Field Artillery, two 5-inch guns, a brigade of Mounted Infantry under General Ridley, and the 21st Brigade (City Imperial Volunteers, Camerons, Sussex, and Derbys) under General Bruce Hamilton. It was found that the Boers had retreated to a crescent of hills turning south-east of the town, and from here they fired on patrols of the New South Wales Contingent. General Hamilton advanced on the Dutchman's haunts, while General Broadwood, with a pom-pom and Field Battery, Roberts's Horse, the Ceylon Mounted Infantry, and Marshall's Horse, made a vigorous flank attack which sent the enemy scudding into space. The casualties were few. Among the wounded were Captain F. Whittaker, Roberts's Horse, since dead; Captain H. Carrington Smith, Royal Dublin Fusiliers; Captain M. Browne, Roberts's Horse; Lieutenant C. Livingstone Learmonth, Roberts's Horse; Lieutenant E. Rex King, Roberts's Horse. General Ian Hamilton unluckily fell from his horse and sustained a fracture of the collar-bone. Generals Hunter and Hart, therefore, hurriedly joined General Ian Hamilton on the 25th at Heidelberg, the former replacing the latter in command there, as General Hamilton's injury temporarily incapacitated him from resuming his duties. How General Hunter managed so opportunely to arrive on the scene must be described. General Hunter, after taking Christiana, moved _viâ_ Vryburg, Lichtenburg, Potchefstroom, and Krugersdorp to Johannesburg. With Colonel Mahon--who had joined him and was in command of the Cavalry Brigade--he had been engaged in the task of pacifying the Wolmaranstad and Potchefstroom districts. Klerksdorp surrendered on the 9th of June (uselessly, as it afterwards appeared). A few days later Colonel Mahon's Cavalry Brigade entered Potchefstroom after a bitterly cold night march. On the 15th General Hunter moved _viâ_ Krugersdorp (which surrendered on the 18th), towards Johannesburg (Colonel Mahon preceding him and moving to Pretoria) and went to Springs in support of General Hamilton's advance to Heidelberg.