For their film “Vrijheren van het Woud” (Lords of the Forest) uit 1958, Heinz Sielmann and Henry Brandt had collected over 6 kilometers of film footage. In 1968, Henri Storck went through the unused material and turned it into a 90-minute documentary. Once again, it presents a highly realistic and naturalistic portrayal of the fauna, flora, and people of Central Africa. The Dutch version was released with commentary by Pros Verbruggen
