Don Quixote
with all its unquenchable and irresistible humor, its bright views and its cheerful trust in goodness and virtue, was written in Cervantes' old age, at the conclusion of a life which had been marked at nearly every step with struggle, disappointment, and calamity; it was begun in prison, and finished when he felt the hand of death pressing cold and heavy upon his heart.--Botta.
Volume II · Aiton’s Encyclopedia