It is, moreover, to this period that we date Stendhal's liaison with Mme. Daru the wife of his aged relative, M. Daru. This particular intrigue has, moreover, a certain psychological importance in that Mme. Daru constituted the model on whom Mathilde de la Mole was drawn in _The Red and the Black_. The student and historian consequently who is anxious to check how far the novelist is drawing on his experience and how far on his imagination can compare with profit the description of the Mathilde episode in _The Red and the Black_ with those sections in Stendhal's Journal entitled the _Life and Sentiments of Silencious Harry_, _Memoirs of my Life during my Amour with Countess Palfy_, and also with the posthumous fragment, _Le Consultation de Banti_, a piece of methodical deliberation on the pressing question. "Dois-je ou ne dois-je pas avoir la duchesse?" written with all the documentary coldness of a Government report. It is characteristic that both Bansi and Julien decide in the affirmative as a matter of abstract principle. For they both feel that they must necessarily reproach themselves in after life if they miss so signal an opportunity. Disgusted by the Restoration, Stendhal migrated in 1814 to Milan, his favourite town in Europe, whose rich and varied life he savoured to the full from the celebrated ices in the entreates of the opera, to the reciprocated interest of Mme. Angelina Pietragrua (the Duchesse de Sansererina of the Chartreuse of Parma), "a sublime wanton à la Lucrezia Borgia" who would appear to have deceived him systematically. It was in Milan that Stendhal first began to write for publication, producing in 1814 _The Lives of Haydn and Mozart_, and in 1817 a series of travel sketches, _Rome, Naples, Florence_, which was published in London. It was in Milan also than Stendhal first nursed the abstract thrills of his grand passion for Métilde Countess Dunbowska, whose angelic sweetness would seem to have served at any rate to some extent as a prototype to the character of Mme. de Rênal. In 1821 the novelist was expelled from Milan on the apparently unfounded accusation of being a French spy. It is typical of that mixture of brutal sensuality and rarefied sentimentalism which is one of the most fascinating features of Stendhal's character, that even though he had never loved more than the lady's heart, he should have remained for three years faithful to this mistress of his ideal. In 1822 Stendhal published his treatise, _De l'Amour_, a practical scientific treatise on the erotic emotion by an author who possessed the unusual advantage of being at the same time an acute psychologist and a brilliant man of the world, who could test abstract theories by concrete practice and could co-ordinate what he had felt in himself and observe in others into broad general principles.