He wrote about in detail of his encounters with the Luba people, the Kuba Kingdom, the Balega (in the historically cannibalistic areas of Maniema, including the Bwame secret society), the Efe Pygmies of the Ituri forest and the neighboring Balese, the Tutsi of Rwanda, the Maasai people of Kenya, the Bagoma people, and the pygmoid Bamosso of Burundi. He also had encounters with multiple other cultures, including the Balamba (near Zambia), the Bahutu (Rwanda), Bahunde, the Bambuba, the Batalinga, and the pygmoid Batwa of Rwanda.