The next morning the column, which numbered about 1,200 men of all arms, started.  After marching for four or five hours in the direction of Khor Wintri the cavalry, who covered the advance, came in contact with the Dervish scouts.  The force thereupon assumed an oblong formation:  the mixed Soudanese company and the two guns in front, three Egyptian companies on each flank, the Camel Corps company in the rear, and the transport in the centre.  The pace was slow, and, since few of the camels had ever been saddled or ridden, progress was often interrupted by their behaviour and by the broken and difficult nature of the country.  Nevertheless at about four o’clock in the afternoon, Teroi Wells, eight miles from Khor Wintri, were reached; and here, having marched nineteen miles, Colonel Lloyd determined to halt.  While the infantry were making the zeriba, the cavalry were sent on under Captain Fenwick (an infantry officer employed on the Staff) to gain touch with the Tokar force, who were expected to have already reached the rendezvous.  Apparently under the belief that Omar Tita and his Arabs would give timely notice of an attack, the cavalry seem to have neglected many of the usual precautions, and in consequence at about five o’clock, when approaching Khor Wintri, they found themselves suddenly confronted with a force of about 200 Dervish horsemen supported by a large body of infantry.  The squadron wheeled about with promptitude, and began to retire at a trot.  The Dervish horsemen immediately pursued.  The result was that the Egyptians began a disorderly flight at a gallop through the thick and treacherous scrub and over broken, dangerous ground.  Sixteen horses fell; their riders were instantly speared by the pursuers.  Rallying thirty-eight troopers, Captain Fenwick seized a rocky hillock, and dismounting with the natural instinct of an infantry soldier, prepared to defend himself to the last.  The remainder of the squadron continued their flight, and thirty-two troopers, under an Egyptian officer (whose horse is said to have bolted), arrived at the Teroi zeriba with the news that their comrades had been destroyed, or had perhaps ‘returned to Suakin,’ and that they themselves had been closely followed by the enemy.  The news caused the gravest anxiety, which was not diminished when it was found that the bush around the zeriba was being strongly occupied by Dervish spearmen.  Two mounted men, who volunteered for the perilous duty, were sent to make their way through this savage cordon, and try to find either the remainder of the cavalry or the Tokar Column.  Both were hunted down and killed.  The rest of the force continued in hourly expectation of an attack.