All the following lives convey inevitably and unconsciously some statement concerning the opportunity offered by existence. To one, it seemed a place for an ecstasy of joy, success, gratification; to another, a great educational establishment for the soul; to a third, an admirable groundwork for practical domestic arrangements and routine; to Renée of Ferrara, a bewildering, weary accumulation of difficulties and distress; to her more charming relative, an enigma shadowed always by the still greater and grimmer enigma of mortality. And lastly, for the strange, elusive Lucrezia, it is difficult to conceive what it must have meant at all, unless a sequence of circumstances never, under any conditions, to be dwelt upon in their annihilating entirety, but just to be taken piecemeal day by day, reduced and simplified by the littleness of separate hours and moments. In a book of this kind, where the intention is mainly concerned with character, and for which the reading was inevitably full of bypaths and excursions, a complete bibliography would merely fill many pages, while seeming to a great extent to touch but remotely upon the ladies referred to, but among recent authors a deep debt of gratitude for information received is due to the following: Jacob Burckhardt, Julia Cartwright, Augusta Drane, Ferdinand Gregorovius, R. Luzio, E. Renier, E. Rodoconarchi, and J. Addington Symonds. Finally, in reference to the portraits included in the life of Beatrice D'Este, a brief statement is necessary. For not only that of Bianca, wife of Giangaleazzo, but also those of Il Moro's two mistresses, Cecilia Gallerani and Lucrezia Crivelli, are regrettably dubious. The picture of Bianca, however, by Ambrogio da Predis, is more than likely genuinely that of Bianca, though some writers still regard it as a likeness of Beatrice herself. It is to be wished that it were; her prettiness then would have been incontestable and delicious. But in reality there is no hope. One has but to look at the other known portraits of Beatrice to see that her face was podgy, or nearly so, and that her charm came entirely and illusively from personal intelligence. It evaporated the moment one came to fix her appearance in sculpture or on canvas. Nature had not really done much for her. There was no outline, no striking feature, no ravishing freshness of colouring. On a stupid woman Beatrice's face would have been absolutely ugly. But she, through sheer "aliveness," sheer buoyant trickery of expression, conveyed in actuality the equivalent of prettiness. But it was all unconscious conjuring,--in reality Beatrice was a plain woman, with sufficient delightfulness to seem a pretty one, while the portrait of Bianca is unmistakably and lovingly good-looking.