The Colonial Report for 1907-8 carried us no further, as the third Survey party which arrived in the country in December 1907 were still upon their seven months expedition, and the results of their work had not been received. The report referred, however, to the fact that the Niger Company, continuing its work on its licensed area in the Bauchi Province, were exporting black tin to the amount of 500 tons per annum, and added: “The main difficulty in the development of this promising industry is its situation. With the construction of the railway through Zaria it should be possible to place the mines in close connection with it by means of a road, which should also serve the Bauchi Province.” THE REPORTS OF EXPERTS In one of his reports on the Bauchi tin area, Mr. Lush says: “There is not the slightest doubt that before very long many of the deep alluvial flats that are some distance from the shallow and more easily worked tin ground will be worked. The values may turn out to be poorer than the shallow ground, but the natural facilities are better owing to the water supply being sufficient for continuous working without the expense of erection of dams. On the other hand, when you get out of the granite country, the further you are away from the source of the tin the greater are the impurities mixed with it. The numerous creeks, after passing through the schists and other rocks emptying into the main river, all tend to this, and titanic iron, tourmaline, rutile, and gem sand form a large percentage of the concentrates. However, if on boring, the deep ground turns out payable, there should be no difficulty in getting rid of the impurities and dressing the tin up to 70 per cent.” Mr. L. H. L. Huddart, writing on this subject in his report on the South Juga property, says: “_Sources of the Tin._—The black tin is probably derived from the granite of which it is a rock constituent, and from stockworks in the granite quartz porphyry occurs very similar to the ‘elvans’ in Cornwall. “_Nature of the Wash._—In the upper end the wash is a fine whitish granite, containing no large pebbles or boulders, and is near the original source of some of the Juga tin. The surface is slightly cemented with iron oxides in which cassiterite often grows. The whole wash very easily breaks down with water. The ground further down the property is similar except that the alluvial has travelled further, and consequently has been sorted to a greater extent. “Taken generally, the tin bearing is the product of denudation from the granite of which the bed-rock, and sides of the valley are composed. The tin occurs in the wash right up against the granite on both sides of the valley. The topaz is abundant in the wash, and with some zircon and rootile is almost the only mineral besides cassiterite occurring in the concentrates.” In his report on the Kurdum River Tin Concession, Mr. Huddart says: