at the southern end of Lake Tanganyika, on the shores of Lake Mweru, and in parts of the Luapula Valley, all of which districts form outlying portions of the territory of North-Eastern Rhodesia.
2. The Administrator of North-Eastern Rhodesia has for some time past been energetically fighting this pest, and the measures taken promise to be to some extent successful.
3. Sleeping sickness is spread by the variety of tsetse fly known as Glossina palpalis, and it has, I believe, not yet been shown that the trypanosomes are distributed under natural conditions through any other channel.
Glossina palpalis is found on the shores of Lakes Tanganyika and Mweru, in portions of the Luapula Valley, and for a comparatively short distance up the valleys of several of the larger rivers tributary to those waters.
G. palpalis is not known to exist in any other parts of North-Eastern Rhodesia, neither on Lake Bangweulu nor on any other rivers running through that territory. Up to the present, it has not been discovered on Lake Nyasa or within the limits of the Protectorate of Nyasaland, though diligent search has been made, and is still being carried on.
Throughout North-Eastern Rhodesia and Nyasaland there are very large areas in which other varieties of tsetse fly are found, principally Glossina morsitans.
4. In North-Eastern Rhodesia sleeping sickness closely follows the distribu- tion of Glossina palpalis, and the opinion of Dr. J. C. Spillane, Principal Medical Officer for the North-Eastern Rhodesia Administration, is that this fly must be at present regarded as the only sleeping sickness trypanosome carrier. All steps taken by that Administration have been based on this supposition. Working on these fines "palpalis country" has been, or is being, entirely depopulated, villages being moved to country where the fly does not exist; and palpalis-infected districts are being as far as possible closed to natives,
5. Nyasaland natives are great wanderers (mostly in search of work), and with the advance of sleeping sickness it has become increasingly evident that sooner or later imported cases would reach the Protectorate. So far as is possible with the available medical staff, my endeavour since I returned to Africa in March last has been-
(a) to obtain accurate knowledge as to the distribution throughout Nyasa-
land of the various descriptions of tsetse fly; (b) to search for imported cases of sleeping sickness with a view to their
isolation;
(c) to prevent communication between Nyasaland and sleeping-sickness
countries.
6. Two additional medical officers were sent to the Protectorate some months ago in order that I might be in a better position to carry out investigation work. Dr. J. B. Davey took the upper third of Lake Nyasa's western shore; Dr. Captain F. H. Hardy the central and more southern portions, while Dr. E. H. A. Pask, who is stationed at Fort Johnston, is carrying out as much work at the south end of Nyasa as his ordinary duties will allow. All other medical officers in their different districts are devoting attention to investigation questions.
7. About the 12th of October Dr. Davey discovered at Nkata, on the west shore of Nyasa, the first known case in the Protectorate of imported sleeping sickness, an Atonga native, who had been about a year ago in the Tanganyika and Congo regions.
8. I enclose a copy of Dr. Davey's report, also of the report made to me by Dr. Norris, the Acting Principal Medical Officer for the Protectorate, together with the scheme of operations which he considers should now be adopted in Nyasaland.
9. On receiving Dr. Davey's first telegram announcing this case of sleeping sickness, I telegraphed to your Lordship, after consultation with Dr. Norris, requesting that the two additional medical officers asked for in April last might be sent, and that sanction be given for obtaining five Indian hospital assistants.
10. Dr. Spillane recently arrived in Zomba on his way to England, and the opportunity was thus afforded for a thorough discussion of the details of his sleeping sickness work and experiences in North-Eastern Rhodesia. As a result of this conference, I decided, with the concurrence of Dr. Norris, to postpone the
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