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returning, but whether or not, there is any danger of the disease 
coming in from the North, this route must not be forgotten. Skilled 
workmen and raw labour as well, from Nyassaland, are still in the 
Katanga. The presence in the Protectorate of Gl. fusca, known to 
be capable of transmitting T. ganibiense, is of importance if cases are 
found. 
‘ I cannot deprecate too strongly the continued permission to the 
Tanganyika Concessions to carry loads from Madona to Kambove 
with Rhodesian natives. The anomaly of this is at once apparent 
when it is remembered that free recruiting for the mines has been 
stopped. Another anomaly is that while Kambove is not regarded 
as being in the “ infected ” area of the Katanga, a strip 10 miles wide, 
along this side of the Luapula, has officially been declared to be 
infected. By allowing natives to pass, therefore, from an infected to 
a non-infected district the extension of the disease is inevitable. In 
my opinion the Luapula should be absolutely closed. 
‘ There is a possibility of slight danger being attached to the 
Karonga-Kasama route. Cases of sleeping sickness will probably be 
found in the Awemba district of North-East Rhodesia, and tsetse-fly 
exists along the road in places. At present, however, I am inclined 
to think the danger is remote. 
‘When 1 was in Fort Jameson, Dr. Barclay told me that the 
results of the palpation of all the neck glands, not simply those in 
the posterior triangle, had been included in the report sent to the 
Colonial Office early in January (dated Zomba, January 24th, 1907). 
If this is correct for all the figures, they would need to be corrected. 
W/’ere any of the “ + ” cases punctured ? In view of what we have 
found in Rhodesia, this would be advisable. The cases I found had 
“ -I- ” glands, and, of course, showed the parasite (of five “ -1- ” cases 
seen, three were infected). Of 9,005 natives examined by me 
between July and December, 20‘85 % had palpable glands, mostly 
very few in number and shotty to the touch. 
' One other point on which I should like to touch is the question 
of what tsetse flies are able to transmit the disease. As you will 
know Gl. pal pal is and Gl. fusca have been shown to be capable of 
doing so. Whether or no the other species can effect the transmission 
as well, is not known, but since mechanical transmission is the only 
method of which we have any knowledge at present, the part these 
