In 1752 he became a subservient in the Hortus Botanicus Leiden, where he remained for the rest of his life.
[2] The volumes contain 50 engravings, which he made of plants from the Hortus botanicus Leiden and butterflies.
In 1789 he published Plantae rariores vivis coloribus depictae, a full Latin version of his earlier work with 55 color plates and four extra pages of text and also published Plantarum selectarum icones pictae with 28 color images .
An example of a botanical name he published is Impatiens capensis Meerb.
The Missouri Botanical Garden owns original copies of Pictures of Rare Crops and Plantarum selectarum icones pictae and has put them Digitized and put them on the Internet.