In 1761, Jean-Jacques Rousseau wrote "Julie, or the New Heloise". The title is a reference to Peter Abelard, a 12th-century philosopher, who fell in love with his pupil, Héloïse d'Argenteuil. They had a child and secretly married. When Heloise's guardian found this, he had Abelard castrated. The story was well-known at Rousseau's time, after their letter had been published. Rousseau's book, Julie, is about the titular character and her tutor St. Preux. The book is written in the form of letters. Julie's father opposes the relation and marries her to another man, whom he considers more suitable.