[3][4] She married the missionary Johann Gottlieb Hartmann, and travelled with him to Suriname in 1826; the couple lived and worked in Paramaribo and Charlottenburg, Wanhatti.
[6] One of their sons went to South Africa to work with the slaves there.
[1] Johann died in 1844, but Maria continued her service, working with the black population of Berg en Dal and Bambey,[b] and traveling into the bush country to teach the freed blacks.
[6] She suffered from elephantiasis, but continued to work until dying; upon her death a number of articles were written praising her example.
[1] In 1965,[11] Koffiekamp was flooded after the construction of the Afobaka Dam.