Colonel Wodehouse, who is at Wady Halfa, reports the existence at Ginnis of a new Mahdist camp, formed within the past month, which now numbers from six to seven thousand Tokuls. On the west bank, a smaller camp is being formed at Dal. The Arabs daily scout in numbers right up to Sarras and to the fort at Khor Moussa, on which they fire nightly. Saleh Bey, the Sheikh of the Abadeh tribe, whose duty it is to guard the eastern desert between Korosko and the Wells of Murat, has reported that last week, having news of preparations for a forward movement at Abu Hammid, he occupied Murat with a body of 250 men. He was attacked on the night of May 29th by a large force of horse and camel-men, and after a hot engagement, in which he had 57 men killed and lost 108 camels, he was forced to abandon the Wells to the enemy and retreat to the Bab-el-Korosko. The Murat Wells, he says, will not supply a force of 500 men for more than three days, and he, therefore, fears an advance on Ongat and Haimur. A small body of Kababish tribesmen, the remnant of that once powerful clan who, though for some time with the enemy, are still loyal, have reached Halfa from Dongola, where they say great preparations are being made for an advance. Daily small detachments of Jehadieh and considerable bodies of Ansar arrive at Dongola from Omdurman, and large supplies of provisions are being collected. Three nuggars, laden with dhurra, were wrecked, they say, less than a month ago, on the rocks near Barkhal. A good deal of doubt attaches to this statement, but if it be true, it indicates a very early rise of the Nile, for at this season, as a rule, the whole 140 miles of river from Abu Hammid to Barkhal is a veritable maze of rock-strewn passages, impassable by even the smallest boats. These tribesmen travelled by the west bank, and say that from Dongola to Dal, the route was like that to a fair. The Sirdar starts for the front to-night, and kindly permits me to accompany him. Colonel Kitchener expresses himself thoroughly confident that his own troops are strong enough to cope with any forces the enemy may bring to meet him; but a feeling of uneasiness in some high quarters here, coupled may be with the fact that troops at Halfa and Korosko have lately suffered severely from influenza, has caused some pressure to be brought on him, with the result that it has been decided that the 17th Bengal Native Infantry and the 29th Beloochees are to act under his orders and co-operate with the Egyptian forces if necessary. They were sent by train to Assiout yesterday afternoon, and have already started for Assouan, Mr. Cook having undertaken their transport in flat-bottomed barges, towed by steamers of four feet draught. My next letter will probably be from Wady Halfa. FIERCE BATTLE NEAR WADY HALFA. FULL DESCRIPTION OF THE FIGHT. WADY HALFA, _June 14th_.