26o POPULAR SCIENCE MONTHLY. 



chiefly, to illustrate the work done by Mr. Seloiis while in the 

 service of the South African Company; and, secondly, to embody, 

 as far as possible, the knowledge possessed of the entire region 

 extending from Fort Salisbury to the northward as far as the Zam- 

 bezi, and to the eastward as far as the lower Pungwe. Mr. Selous's 

 manuscript originals, deposited in the map room of the Royal Geo- 

 graphical Society, comprise a compass survey, showing the routes 

 during a year's employment in the service of the British South 

 African Company, September 1, 1890, to September, 1891, on a 

 scale of 1 : 255,000; a sketch map, showing the route of the Ma- 

 nika Mission from Fort Charter to Umtassa's and thence to the 

 camp near Mount Wedza, and also the routes taken by Mr. Selous 

 from the camp near Mount Wedza to Makoni's, Mangwendi's, Ma- 

 ranka's, and back to Makoni's, on a scale of 1 : 255,000; a sketch 

 of routes from Umtali to Mapanda (Pungwe) and back, in 1891, 

 on the same scale; a sketch of Mashonaland, showing tribal bound- 

 aries, on the same scale; a rough survey map of the countries 

 ruled over by the Makorikori chiefs, for which a mineral conces- 

 sion had been granted to the Selous Exploration Syndicate, on a 

 scale of 1 : 210,000; and about thirty sheets of manuscript maps 

 and rounds of angles, utilized in the compilation of the first four 

 maps of this list. 



Although Mr. Selous did not determine latitudes or longitudes, 

 his long-distance compass bearings enabled him to lay down a net- 

 work of triangles connecting Fort Salisbury with Masikesi. These 

 triangles included Fort Charter, Sengedza, and Mavanka's in the 

 south. Mount Mtemwa in the north, and Mount Dombo in the 

 east; and it turns out that the distance between Fort Salisbury and 

 Masikesi, as resulting from this triangulation, diifers to the extent 

 of only about a mile from that obtained by careful astronomical 

 observations made at the two terminal points. The greater part 

 of Mr. Selous's compass bearings were taken during the rainy 

 season, when the air was very clear and landmarks could be seen 

 at great distances. Mr Selous's determinations of altitude were 

 not so accurate, and those obtained with the aneroid were charac- 

 terized by himself as " of little value." 



During all of his twenty years' wanderings Mr. Selous repre- 

 sented in his address to the Poyal Geograi)liical Society, with the 

 exception of a treacherous night attack made upon his camp by 

 the Mashuku-Sumbwe, led by a few hostile Marotse, in 1888, he 

 had never had any serious trouble with the natives. lie had gone 

 among many tribes who had never previously seen a white man, 

 and was always in their power, as he seldom had more than from 

 five to ten native servants, none of whom were ever armed. Mr. 



