Complex sentence: Leavitt embarked on a career as an editor poet, professor, writer and university president; from 1868 to 1871 he was the editor of the "The American Quarterly Church Review and Ecclesiastical Register".
Split into simpler sentences: Leavitt embarked on a career as an editor poet, professor, writer and university president. From 1868 to 1871 he served as the editor of the "The American Quarterly Church Review and Ecclesiastical Register".