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all naturally preferred to secure the handsomer, black- 
coated trophies farther south. Hence we have all (myself 
included) left neglected and unexamined the northern 
race, which remains virtually unknown. 
One first sees these handsome antelopes at a point 
about 300 miles south of Khartoum. While northward- 
bound in 1913, I carefully examined two or three troops 
a trifle north of that point. Though all were uniformly 
tawny, yet, to my surprise, several bucks carried fine 
White-eared Cob. —Sketched South of Kaka, January 24th, 1914. 
heads—one in particular the best I had seen that year. 
Similar experiences befell later — on Abba Island for 
example; but having already shot my “limit,” no speci¬ 
men could be legally secured. Though four head per 
year is ample allowance for a sportsman, it necessarily 
handicaps the investigations of a naturalist. 
It is not till after passing Jebel Ahmed Agha (340 
miles) that one notices the earliest indications of a “black 
coat,” and from thence southward the traveller enters the 
typical domain of Adenota leucotis. At dawn and dusk 
the riverain prairies become “quick” with thirsty files, 
and, whether a hunter or not, everyone capable of 
