As the Weinling family were the only persons who had ever worked in skin-balloon manufacture, and as he himself was the only other person acquainted with the art, Major Templer asked and obtained leave to have two sappers trained to the work. But this new departure led before long to further troubles. The family were very jealous of their secret, and when the balloon factory began to be enlarged it was only with the greatest difficulty that the members of the family could be induced to give instruction to other workers. Nevertheless, in the course of a year, several balloons were made, of three sizes, the largest size having ten thousand cubic feet of capacity, and the smaller sizes seven thousand and four thousand five hundred cubic feet. When, in the autumn of 1884, an expedition was sent to Bechuanaland under Sir Charles Warren, to expel the filibusters who had raided the territory, to pacificate the country, and to reinstate the natives, a balloon detachment under Major Elsdale and Captain F. C. Trollope, of the Grenadier Guards, attached to the Royal Engineers, was included in the expedition. They took with them in the detachment three balloons, and a staff consisting of fifteen non-commissioned officers and men. There was no fighting. At Mafeking, which was then a native village, it was found that owing to the elevation above sea-level neither of the two smaller balloons had lift enough to raise a man into the air, and that the largest balloon could take up only one observer. A native chief, Montsiou by name, went up a short distance in the balloon. The remark that he made serves to show the value of aircraft in impressing primitive peoples. 'If the first white men', he said, 'who came into this country had brought a thing like that, and having gone up in it before our eyes, had then come down and demanded that we should worship and serve them, we would have done so. The English have indeed great power.' The chief was right. For any nation to which is entrusted the policing and administration of large tracts of uncivilized country, an air force, civil and military, is an instrument of great power. Balloons were used again on active service in the following year, 1885, in the Soudan. A small detachment, under Major Templer with Lieutenant R. J. H. L. MacKenzie, of the Royal Engineers, and nine non-commissioned officers and sappers, accompanied the expeditionary force. The best of the material had been sent to Bechuanaland, so the equipment was very imperfect, but ascents made in a balloon of one of the smaller types, at El Teb and Tamai, and elsewhere, proved useful for reconnaissance.