Complex sentence: Delanoy was still in New York in the early 1780s, and gave some lessons to William Dunlap, who later wrote sadly of his former teacher's later years, stating that he was consumptive and poor, and reduced to painting signs to make a living.
Split into simpler sentences: Delanoy was still in New York in the early 1780s, and gave some lessons to William Dunlap. Dunlap wrote sadly of his former teacher's later years, stating that he was consumptive and poor, and reduced to painting signs to make a living.