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I.  INTRODUCTION 
The  members  of  this  expedition  reached  Broken  Hill  in  June, 
1907:  one  of  us  (A.  K.)  shortly  afterwards  proceeding  to  Fort 
Jameson  and  thence  to  Madona  on  the  river  Luapula.  The  other 
(R.  E.  M.)  remained  at  Broken  Hill  until  October,  investigating  the 
trypanosome  disease  in  cattle,  and  then  proceeded  along  the  river 
Kafue  and  through  the  corner  of  the  Congo  State  to  Madona,  where 
the  first  meeting  was  effected  in  December.  In  February  a  joint  tour 
was  made  of  Lake  Bangueolo  ;  A.  K.  then  travelling  North  via  Luena, 
Kalungwisi  and  Chienji,  and  'West  to  Lake  Tanganyika  and 
Abercorn.  R.  E.  M.  proceeded  southwards  along  the  outlet  of  the 
Luapula  river  from  Bangueolo  and  thence  North  via  Mpika,  Chinsali 
and  Kasama  to  effect  a  second  meeting  at  Abercorn  in  June,  1908. 
In  August  and  September  the  latter  made  a  tour  of  the  Stevenson 
Road,  visiting  Kawimbi,  Ikomba,  Mwenzo,  Fife  and  Chinsali,  for  a 
second  time,  returning  to  Kambole,  where  an  experimental  camp  had 
been  built,  via  Abercorn. 
Orders  to  return  to  England  were  received  in  November,  and 
on  the  15th  we  left  Kambole.  A.  K.  proceeded  to  the  coast  via  Fife, 
Karonga,  Blantyre  and  down  the  Shire  River  ;  R.  E.  M.  attended  the 
Pan-African  Veterinary  Conference  at  Pretoria  as  delegate  of  the 
School,  and  travelling  via  Kasama,  Mpika,  Serenji  and  Broken  Hill 
reached  that  place  on  January  9th,  1909. 
Our  unavoidable  recall  to  England  before  the  experiments  on 
transmission  were  fully  established  is  to  be  regretted,  as  it  was  the 
first  occasion  since  leaving  the  railway  that  we  were  together  and 
were  able  to  remain  in  one  place  for  more  than  a  few  consecutive 
days,  and  to  attempt  anything  like  continuous  experimentation.  As 
a  result  our  observations  are  necessarily  limited  and  unfinished,  and 
the  paramount  questions  as  to  whether  flies  other  than  tsetse  are  to 
be  held  culpable  for  the  transmission  of  the  trypanosomes  we 
encountered  ;  whether  ‘  game  ’  is  the  main  natural  reservoir  for  these 
trypanosomes,  and  whether  tsetse  are  unable  to  exist  without  ‘  game 
still  await  final  solution. 
We  have  already  reported  our  observations  at  Broken  Hill :  our 
results  on  similar  conditions  in  North-Eastern  Rhodesia  are  recorded 
here  together  with  a  summary  of  our  notes  on  the  distribution  of 
