Rinaldo, witnessing from a mountain the prowess of Rodomont, leaves his troops in charge of his friends, and gallops towards him with his lance in the rest. The impulse is irresistible, and Rodomont is unhorsed. Rinaldo, however, in a high spirit of chivalry, gallops back to the hill from which he had descended, secures Bayardo amongst the baggage, and returns to pursue the combat with his former antagonist on foot.
During this interval the battle had become general, the Hungarians were routed by Rodomont, and Rinaldo, on his return, had the mortification to find that Ottachiero was wounded, and Dudon a prisoner.
He now again engages Rodomont; when in the midst of their strife, a new sound of drums and trumpets was heard, and the army of Charlemagne was descried advancing in battalia.
Rodomont, who had in the meantime mounted the horse of Dudon, leaves Rinaldo, who was on foot, and gallops to the attack of the enemy. A desperate battle ensues, but night separates the combatants.
Rodomont now thinks only of Rinaldo, and deceived by a false report, sets off in pursuit of him towards the forest of Arden.
Rinaldo, however, having this time gone in search of Bayardo, was returning towards the field upon that courser, when he fell in with the Saracens, engaged in carrying aboard their ships the plunder, and the prisoners made in battle. Some of these had already sailed for Africa with Dudon, while Rinaldo, still seeking Rodomont, makes a tremendous carnage among the rest.
He at last learns that his adversary, following a false scent, is gone towards Merlin's fountain, in the forest of Arden, when he quits the pursuit of the Saracens, in order to follow him.
Rodomont was in the meantime far advanced upon his way, when he fell in with a strange cavalier, that proved to be Ferrau, who had, it seems, returned to France, in search of Angelica. The two knights mixing in conversation, their talk, according to the practice of chivalry, turned upon love, when Ferrau spoke of Doralice, daughter of Stordilano, king of Granada, as a lady to whom he had been a suitor. Rodomont, kindling at this, avowed his passion for her, declared he would bear with no rival in his love, and bade him resign all pretensions to her, or take his ground and defend himself. Ferrau replied, that he had loved her and left her; but that he would now love her in his despite.
A duel ensues, but the author leaves the knights engaged, in order to pursue the story of Rinaldo. He, still seeking his pursuer, Rodomont, misses him, whilst he is engaged in combat with Ferrau; and wandering into a sylvan lawn, in the middle of the forest of Arden, is surprised by the vision of a beautiful child, dancing naked, with three damsels, as naked and as beautiful as himself. While he is lost in admiration at the sight, the child approaches him, and smiting on his helmet with a bunch of roses and lilies, strikes him from his horse. He is no sooner down than he is seized by the dancers, by whom he is dragged about and scourged with flowers till he falls into a swoon. While he is yet absorbed in this, one of the group approaches him, who says her name is Pasiphae; that his punishment is the consequence of his rebellion against that power, before whom every thing bends; and that there is but one remedy that can heal the wounds which have been inflicted; and this is, to drink of the waters of Love.
Rinaldo, sore and faint, drags himself into the neighbouring wood, and being parched with thirst, drinks greedily, and almost unconsciously, of a spring which he finds there. After repeated draughts of the water, which is sweet to the taste, but bitter at the heart, he recovers his strength and recollection, and finds himself in the same place where Angelica had formerly awakened him with a rain of flowers, and whence he had fled in contempt of her courtesy.