 Lewanika and Coillard were gradually entangled in a web of intrigue, which resulted in the signing of the Lochner Concession, which assigned the Lozi kingdom to the BSAC's domains on 27 June 1890.During the first seven years after signing the Concession, the BSAC failed to make any of its promised annual payments of £2000 or to provide any of the educational assistance that it had pledged to Lewanika.Christina Coillard died on 28 October 1891 and the group of missionaries suffered a persistent high mortality rate, due primarily to tropical fevers.