[2] The mission expanded to the Mwinilnga district in Zambia's North-Western Province and to neighboring areas of Angola and the Democratic Republic of Congo.
His parents had a deep interest in gospel work and often hosted missionaries, including Robert Chapman and Henry Groves.
Any adult male in the church, often referred to as a "brother", could give a sermon or lead communion; a different approach than most Christian branches that allocate these responsibilities to ordained priests.
Fisher attended Guy's Hospital as a student in 1881 and by 1887 he completed his studies with the qualification of a surgeon and with a gold medal in surgery.
Instead of staying in England to complete his studies for the highest surgical qualification, Fisher decided that he would dedicate his life to missionary work in Africa.
After attending a presentation by Arnot he decided to commit his life to medical and missionary work in Central Africa.
By the turn of the century the Fishers had established a mission station at Kavungu in Angola by the capital of the local Chieftainess, Nyakatolo.
Fisher sought a modern hospital complex that could support the increasing number of African patients and European missionary families in Zambia.
Singleton became a missionary doctor and Ffolliott started a cattle ranch at Kalene Hill after being wounded during his service in World War I.
A network of Brethren families, mission stations, and bible study groups became part of the culture of the local population.