P. Trenk was a scientifically oriented officer of the Schutztruppe (colonial troops) in German South West Africa (now Namibia) around 1909. He reported his observations, made while on journeys or patrols in the Namib desert, in four journal articles. "Eine Patrouille von Sesriem den Tsauchab abw?rts nach Sossus (Namib)" (Deutsche Kolonial Zeitung, 1909) provided a narrative account of his journey from Sesriem, along the Tsauchab River to Sossus Vlei, with an early description and map of the latter. In "Die Buschleute der Namib" (Miteillungen aus den deutschen Schutzgebieten, 1910) he gave a good description of the Namib Bushmen, which differ significantly from those of the Kalahari. "In den D?nen der Namib" (In the dunes of the Namib) appeared in the Deutsche Kolonialblatt in 1910. Finally, "Aus der Namib" (Zeitschrift f?r Kolonial Politik, 1911) provided a narrative account of journeys in the desert.