Complex sentence: He settled at Gnadenhütten, Ohio, in 1801, and devoted himself to the duties of his agency, but resigned in 1810 and engaged in literary pursuits in Bethlehem, Pennsylvania, till his death.
Split into simpler sentences: He settled at Gnadenhütten, Ohio, in 1801, and devoted himself to the duties of his agency. In 1810 he resigned and engaged in literary pursuits in Bethlehem, Pennsylvania, until his death.