Verfasser mehrerer Schriften über die deutsche Kolonie Ostafrika, darunter: "The Victoria Nyanza. The Land, the Races and their Customs, with Specimens of Some of the Dialects" über das es heißt: "This book, an English translation of a study by a former officer of the Imperial Troops for German East Africa, Paul Kollmann, provides detailed information about the land and peoples living along the shores of the lake." - https://commons.wikimedia.org/wiki/File:The_Victoria_Nyanza._The_Land,_the_Races_and_their_Customs,_with_Specimens_of_Some_of_the_Dialects_WDL2557.pdf, 03.02.2019
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