The gunboats continued to advance, beating up slowly against the strong current. As they came opposite Hafir, where the channel narrows to about 600 yards, they were received by a very heavy fire from guns placed in cleverly screened batteries, and from the riflemen sheltered in deep pits by the water's edge or concealed amid the foliage of the tops of the palm-trees. These aerial skirmishers commanded the decks of the vessels, and the shields of the guns were thus rendered of little protection. All the water round the gunboats was torn into foam by the projectiles. The bullets pattered against their sides, and, except where they were protected by steel plates, penetrated. One shell struck the Abu Klea on the water-line, and entered the magazine. Luckily it did not explode, the Dervishes having forgotten to set the fuse. Three shells struck the Metemma. On board the Tamai, which was leading, Commander Colville was severely wounded in the wrist; Armourer-Sergeant Richardson was killed at his Maxim gun, and on each boat some casualties occurred. So hot was the fire that it was thought doubtful whether to proceed with the bombardment, and the Tamai swung round, and hurried down the river with the current and at full steam to report to the Sirdar. The other gunboats remained in action, and continued to shell the Dervish defences. The Tamai soon returned to the fight, and, steaming again up the river, was immediately hotly re-engaged. The sight which the army witnessed was thrilling. Beyond the flood waters of the river, backed against a sky of staring blue and in the blazing sunlight, the whole of the enemy's position was plainly visible. The long row of shelter trenches was outlined by the white smoke of musketry and dotted with the bright-coloured flags waving defiantly in the wind and with the still brighter flashes of the guns. Behind the entrenchments and among the mud houses and enclosures strong bodies of the jibba-clad Arabs were arrayed. Still further back in the plain a large force of cavalry--conspicuous by the gleams of light reflected from their broad-bladed spears--wheeled and manœuvred. By the Nile all the tops of the palm-trees were crowded with daring riflemen, whose positions were indicated by the smoke-puffs of their rifles, or when some tiny black figure fell, like a shot rook, to the ground. In the foreground the gunboats, panting and puffing up the river, were surrounded on all sides by spouts and spurts of water, thrown up by the shells and bullets. Again the flotilla drew near the narrow channel; again the watching army held their breath; and again they saw the leading boat, the Metemma, turn and run down stream towards safety, pursued by the wild cheers of the Arabs. It was evident that the gunboats were not strong enough to silence the Dervish fire. The want of the terrible Zafir was acutely felt.