Simplify the following text for a Grade 7 native English-speaking person.
Original: He came from a prosperous family , worked briefly as a lawyer in the 1820s , and held the post of Professor of Geology at King 's College London in the 1830s .
Simplified: He came from a prosperous family , worked briefly as a lawyer in the 1820s . He held the post of Professor of Geology at King 's College London in the 1830s .