The
Shire Highlands south of Lake Nyasa (now
Lake Malawi) and the lands west of the lake were explored by David Livingstone between the 1858 and 1864 as part of his Zambezi expeditions. Livingstone suggested that what he claimed was the area's benign climate and fertility would make it ideal for the promotion of Christianity and commerce. As a result of Livingstone's writings, several Anglican and Presbyterian missions were established in the area in the 1860s and 1870s. In 1878 The African Lakes Company Limited, predecessor to the
African Lakes Corporation Limited, was established in
Glasgow by a group of local businessmen with links to the Presbyterian missions. Their aim was to set up a trade and transport concern that would work in close cooperation with the missions to combat the slave trade by introducing legitimate trade, to make a commercial profit, and to develop European influence in the area. A mission and small trading settlement was established at
Blantyre in 1876 and a British
consul took up residence there in 1883. Concessionaires holding
prazo estates from the Portuguese crown were active in the lower valley of the
Shire River from the 1830s and the Portuguese government claimed
suzerainty over much of Central Africa, without maintaining effective occupation over more than a small part of it. In 1879, the Portuguese government formally claimed the area south and east of the
Ruo River (which currently forms the southeastern border of Malawi), and in 1882 occupied the lower
Shire River valley as far north as the Ruo River. The Portuguese then attempted to negotiate British acceptance of their territorial claims, but the convening of the
Berlin Conference (1884) ended these bilateral discussions. Meanwhile, the African Lakes Company was attempting to obtain the status of a
Chartered company from the British government, but it had not managed to do so by 1886. In 1885-86
Alexandre de Serpa Pinto undertook a Portuguese expedition which reached the Shire Highlands, but it failed make any treaties of protection with the
Yao chiefs in territories west of Lake Malawi. As late as 1888, the British
Foreign Office declined to accept responsibility for protecting the rudimentary British settlements in the Shire Highlands, despite unsubstantiated claims by the African Lakes Company of Portuguese interference with their trading activities. However, it also declined to negotiate with the Portuguese government on their claim that the Shire Highlands should be considered part of
Portuguese East Africa, as it was not regarded by the Foreign Office as under effective Portuguese occupation. In order to prevent Portuguese occupation, the British government sent
Henry Hamilton Johnston as British consul to Mozambique and the Interior, with instructions to report on the extent of Portuguese rule in the
Zambezi and Shire valleys and the vicinity, and to make conditional treaties with local rulers beyond Portuguese jurisdiction. These conditional treaties of friendship did not amount to the establishment of a British protectorate but prevented those rulers from accepting protection from another state. On his way to take up his appointment, Johnston spent six weeks in
Lisbon in early 1889 attempting to negotiate an acceptable agreement on Portuguese and British
spheres of influence in Central Africa. The draft agreement reached in March 1889 would have created a British sphere including all the area west of
Lake Nyasa and also
Mashonaland but not including the
Shire Highlands and Lower Shire valley, which were to be part of the Portuguese sphere. This went beyond what the Foreign Office was prepared to accept, and the proposal was later rejected. In 1888, the Portuguese government instructed its representatives in Portuguese East Africa to attempt to make treaties of protection with the
Yao chiefs southeast of Lake Malawi and in the Shire Highlands, and an expedition organised under Antonio Cardoso, a former governor of
Quelimane, set off in November 1888 for the lake. Rather later, in early 1889, a second expedition led by
Alexandre de Serpa Pinto moved up the Shire valley. Between them, these two expeditions made over twenty treaties with chiefs in what is now Malawi. Serpa Pinto met Johnston in August 1889 east of the Ruo River, when Johnston advised him not to cross the river into the Shire Highlands. Previously, Serpa Pinto had acted with caution, but in September, following minor clashes between Serpa Pinto's advancing force and
Kololo who had been left behind by Livingstone at the end of his Zambezi expedition in 1864 and had formed minor chieftainships, he crossed the Ruo to
Chiromo, now in Malawi. In response to this incursion, Johnston's deputy
John Buchanan declared a
Shire Highlands Protectorate in Johnston's absence, despite the contrary Foreign Office instructions. It seems probable that Buchanan's action, made without reference to the Foreign Office, but following instructions that Johnston had left before he departed for the north, was to prevent any further advance by Serpa Pinto rather than to establish British rule in the area. However, in October 1889 Serpa Pinto's soldiers attacked one of the Kololo chiefs, killing around 70 of his followers and, with two armed river boats, pushed up the Shire River through the area over which Buchanan had established a protectorate. After Serpa Pinto's departure owing to serious illness in November 1889, his second-in-command, João Coutinho, pushed on as far as Katunga, the nearest river port to Blantyre, and some Kololo chiefs fled to Blantyre for safety. Johnston's proclamation of a further protectorate, the
Nyasaland Districts Protectorate, west of Lake Malawi was also contrary to Foreign Office instructions. However, it was endorsed by the Foreign Office in May 1891. This was because the discovery of the
Chinde channel in the
Zambezi delta, which was deep enough to allow sea-going ships to enter the Zambezi, which was an international waterway, without having to enter Portuguese territory, whereas previously such ships had to use the port of Quelimane. Salisbury was also influenced by the offer by the
British South Africa Company to fund the administration of the protectorate, which convinced him to bow to popular pressure. There followed an Anglo-Portuguese Crisis in which a British refusal of
arbitration was followed by the
1890 British Ultimatum of 11 January 1890. This demanded that the Portuguese give up all claims to territories beyond the Ruo River and west of Lake Malawi. The Portuguese government accepted under duress and ordered their troops in the Shire valley to withdraw to the south bank of the Ruo. This order was received by the commander at Katunga on 8 March 1890 and all Portuguese forces had evacuated Katunga and Chiromo by 12 March. An
1891 Anglo-Portuguese treaty fixed the southern borders of what had been renamed the British Central Africa Protectorate. Although the Ruo River had been the provisional boundary between Portuguese and British spheres of influence since 1879, as part of the 1891 treaty and under strong British pressure, an area west of the Shire and south of its confluence with the Ruo which had been controlled by an Afro-Portuguese family, was allocated to Britain and now forms the
Nsanje District. The treaty also granted Britain a 99-year lease over
Chinde, a port at one of the Zambezi delta mouths where sea-going ships could transfer goods and passengers to river boats. The northern border of the protectorate was agreed at the
Songwe River as part of the
Anglo-German Convention in 1890. Its western border with
Northern Rhodesia was fixed in 1891 at the
drainage divide between Lake Malawi and the
Luangwa River by agreement with the
British South Africa Company, which governed what is today
Zambia under
Royal Charter until 1924. ==Consolidation==