The story begins with a little bit of autobiography, Rossetti telling about his thoughts as a child, when he played at his father's knee on winter evenings. Of course these memories did not appear as his own; but as those of the painter supposed to tell the story. As a child this painter was very fond of picture books. In the house there was one picture book containing a picture of a saint--St. Agnes--which pleased him in such a way that he could spend hours in contemplating it with delight. But he did not know why. He grew up, was educated, became a man and became a painter; and still he could not forget the charm of the picture that had pleased him when a child. One day a young English girl, a friend of his sister's, comes to the house on a visit. He is greatly startled on seeing her, because her face is exactly like the face of the saint in the picture book. He falls in love with her, and they are engaged to be married. But before that time he paints her portrait, and as her portrait happens to be the best work of the kind that he ever did, he sends it to the Royal Academy to be put on exhibition. Critics greatly praise the picture, but one of them remarks that at Bologna in Italy there is a painting of St. Agnes that very much resembles it. Upon this he goes to Italy to find the picture, and does find it after a great deal of trouble. It is said to be the work of a certain Angiolieri, who lived some four hundred years ago. Every detail of the face proves to be exactly like that of the living face which he painted in London. Being greatly startled by this discovery, he examines the catalogue of paintings, which he bought at the door, in order to find out whether there is anything else said in it about the model from whom Angiolieri painted that St. Agnes. He cannot find any information about the model; but he finds out that in another part of the building there is a portrait of Angiolieri, painted by himself. I think you know that many famous artists have painted portraits of themselves. Greatly interested, he hurries to where the picture is hanging, and finds, to his amazement, that the portrait of Angiolieri is exactly like himself--the very image of him. Was it then possible that, four hundred years before, he himself might have been Angiolieri, and had painted that picture of St. Agnes?