Complex sentence: In 1858 Gneist was appointed ordinary professor of Roman law, and in the same year commenced his parliamentary career by his election for Stettin to the Prussian House of Representatives, in which assembly he sat thenceforward uninterruptedly until 1893.
Split into simpler sentences: In 1858 Gneist was appointed ordinary professor of Roman law. Also in 1858, he commenced his parliamentary career by his election for Stettin to the Prussian House of Representatives, in which assembly he sat thenceforward uninterruptedly until 1893.