Letter from Sir David Bruce, Entebbe, Uganda, to Sir Michael Foster of the Malaria Committee Has received a telegram from the Royal Society asking about trypanosoma 'in serous cavities' -- would like to know what these are -- does not see why control subjects should come from outside the Sleeping Sickness area -- encloses a circular he is sending to 'the missionaries' -- hopes that Castallani, Low and Christy 'are hard at their respective reports.' p50. 19 May 1903