7^> 
may play, given the presence of cases, becomes an important consi¬ 
deration. Even though it should eventually be shown that the 
trypanosomes have a life cycle in any one tsetse fly this niechanirai 
transmission cannot be absolutely ignored. 
‘ Yours faithfully, 
’ Allan Kinghork. 
‘ The Principal Medical Officer. 
'Zomba, Nyassaland.’ 
