Jacobus Theodorus Klein (b. 15 August 1685 d. 27 February 1759) was a German botanist, historian, jurist, mathematician, zoologist, paleontologist and diplomat in service of August II of Poland. In 1718 he set up a botanical garden and built up his natural history collection including fossils.
Armin Geus, ‘Klein, Jacob Theodor’ (1977), <https://www.deutschebiographie.de/sfz41363.html#ndbcontent_zitierweise>. German biography, <https://www.deutsche-biographie.de/home>, [accessed 12 March 2019].
Relationship to Sloane: Virtual International Authority File: