 According to his Index, in 1900 he started a new set of numbers for his specimens.While in Bautzen he met Helena Jutta Schilde, who followed him to South West Africa and married him in Swakopmund on 16 May 1906, after which they settled in Okahandja; she turned out to be a tireless companion and colleague on his many expeditions.In 1907 he was visited by Galpin and Henry Pearson at Okahandja.