When the British administration allowed the first German missionaries to return to Tanganyika Territory in 1925, they started working in the Usambara Mountains, not in Tanga. [33] So Yakobo Lumwe remained the only pastor on the northern coastal region, and Franz Gleiß continued to support him from the Usambaras.
Wakati utawala wa Kiingereza ulipowaruhusu wamisionari wa kwanza kurudi nchini Tanganyika Territory katika mwaka wa 1925, walianza kufanya kazi katika Milima ya Usambara, sio Tanga. [33] Kwa hiyo Yakobo Lumwe alibaki peke yake mchungaji kaskazini pwani mkoani, na Franz Gleiss aliendelea kumuunga mkono kutoka Usambara.