SCALE OF MILES 30 40 50 75 ES ¥ < | Ta ; Rey 113 Gallabate \S a | P=4, 8=12 Fic. 31.—RouGH MAP, SHOWING DISTRIBUTION oF KALA-AZAR IN KASSALA AND BLvuE NILE Districts uP TO May, 1909 The Sudan area (dotted tint) may be considered to be practically free, except from imported cases P = Definitely proved cases S = Suspected cases To these cases must be added— (1) From White Nile (one) (2) Late Dr. Pirrie (3) From Keili (one) (4) From Singa (one)