Pallas went on to open the first apothecary shop in Cape Town and in 1802 employed Pieter Heinrich Poleman as manager.
This led to a partnership in 1810 which lasted until Poleman's death in 1839, whereupon the shop in Strand Street was sold to S. H. Scheuble & Co. Pallas, who had become a dotard in his senility, died in 1840.
Pallas' other stepdaughter, Magdalena Elizabeth Schweinhagen, married the surgeon James Abercrombie (1798-1870), one of the British Settlers who had arrived in Cape Town with Moodie's Party in 1817.
Poleman went up Table Mountain with Burchell during the latter's stay in Cape Town before his 5-year odyssey over Southern Africa.
Poleman was also on friendly terms with William Henry Harvey, the Irish botanist, and Christian Ignatius Latrobe, the Moravian clergyman, artist, musician and composer.