After his recovery he joined the expedition of Emin Pasha to the lake region, was sent ahead from Undussuma to Lake Victoria, and reached the coast in July, 1892, at Bagamoyo, whence he returned to Germany with valuable cartographic material and rich collections, to which he added copiously on another trip to German East Africa, undertaken in 1893-94 by order of the government.
The Zaramo are a Bantu people who are based in Dar es Salaam Region and Pwani Region in Tanzania, particularly in the area around the present day city of Dar es Salaam, the Pugu Hills, and Bagamoyo.