Having received orders to go in pursuit of a strong party of Toubous commanded by Mohammed Erbeimi, a particularly dangerous leader of raiders who had just made a successful foray in British territory, he began by covering 130 miles in three days. Then for four days he patrolled the neighbourhood of Tekro without being able to find any trace of his enemy. He learnt, however, that Mohammed Erbeimi was encamped 130 miles further east, and again covering that distance in three days, he reached the well of Bini Erdi only to find that the band had decamped two days earlier, following in the opposite direction a route nearly parallel to that by which he had come. Allowing his detachment just time enough to water their camels and fill their skin- bottles, he set out again at once, following the tracks of the raiders and forcing the pace! The pursuit, hotter and hotter as the trail of the rebels grew fresher, lasted fifty-one hours, two of which only were allowed for rest, and he came into contact with the rebels at dead of night. Unluckily, the barking of their dogs gave the alarm to the enemy at the last moment. Our men leapt down from their camels and made a sharp and sudden attack on the Toubous, who had not time to organize their defence and fled headlong into the neighbouring rocks, leaving on the ground four killed, all their camels, and the prisoners they had taken in Dar Four. Some time afterwards Mohammed Erbeimi made an attempt to get his revenge. Reinforced by a contingent of Senoussists from Koufra, he organized a flying column a hundred rifles strong and flung it by a rapid march on our lines of communication between Borkou and Wadai, where our last supplies of the year were on their way. Thanks to the treachery of a Nakazza chief, he was able at daybreak to surprise one of our convoys on the march. Though the escort counted only fifteen rifles under a black sergeant, our black troops offered a bold front; but, overpowered by numbers and deserted by the camel-drivers, all they could do was to save their honour and fall in their tracks. That took place 150 miles south of Faya, in the desert of Mortcha. Now, it so happened that Adjutant Amboroko, with a force of seventy-five rifles, had been patrolling for two days in that same desert, on the look-out for Mohammed Erbeimi’s raiding party, my spies having notified me, albeit rather late, of its appearance on the scene. He was not able to get on its tracks till sixteen hours after the wiping-out of the convoy escort, when he set off at once in pursuit. Two hours later he came upon it by surprise and routed it in a few minutes by a vigorous bayonet-charge; the enemy, taken completely off his guard, abandoned his booty and a certain number of dead, and made off hastily eastwards. Amboroko, an old hand at desert fighting, thereupon judged it expedient to let the Toubous get a few miles’ start, and so lead them to think that he held