Arriving in Angra Pequena on 9 April 1883, Vogelsang acquired the port on 1 May through a purchase agreement with the Nama–Oorlam Captain Joseph Frederiks II.
In a second contract, signed on 25 August, he secured the company a 20 mile deep coastal strip from the Orange River to the 26th parallel south for £500 and 60 rifles; the area became known as Lüderitzland [de].
Both Lüderitz and the signing witness, Rhenish missionary Johannes Bam, knew that Chief Frederiks had no understanding of geographical miles.
[6] In 1884, Nachtigal appointed Vogelsang consul of the district of Bethanie and representative of the Imperial German government in the Lüderitz Bay.
On 1 May 1908, 25 years after acquiring land in Africa, Vogelsang was honored by the Senate of Bremen, the local commercial associations and colonial supporters.