General histories of sculpture allotting a proportionate space to the consideration of the Italian sculptors of the Renaissance are, by Lucy Baxter, "Sculpture, Renaissance and Modern" (New York, 1891); Luebke, "History of Sculpture," translated from the German by F. E. Bunnett (London, 1878); Allan Marquand and A. L. Frothingham, "Textbook of the History of Sculpture" (New York, 1896). A special study of the work of Donatello is made by Hope Rea in a volume of the series of Handbooks of the Great Masters in Painting and Sculpture. A complete list of the sculptor's works is given. Luca della Robbia is the subject of two important French works: by Cavalucci and Molinier, "Les Della Robbia" (Paris, 1884); by Marcel Reymond, "Les Della Robbia" (Florence, 1897). There is a chapter on Luca della Robbia in Walter Pater's "Studies in the History of the Renaissance" (1890), and another in Mrs. Van Rensselaer's "Six Portraits" (Boston, 1889). Mrs. Oliphant has written pleasantly both of Donatello and of Luca della Robbia in "The Makers of Florence." III. HISTORICAL DIRECTORY OF THE WORKS IN THIS COLLECTION. Frontispiece. _Il Marzocco_ (the heraldic lion of Florence). (Donatello.) Made of pietra serena and originally placed on the _ringhiera_ of the Palazzo Vecchio, Florence. Now in the National Museum (Bargello) of that city, while a bronze copy occupies its place in front of the palace. 1. _Musical Angels._ (Donatello.) Bronze bas-reliefs from the high altar of S. Antonio, Padua. Ordered in 1448. Completed in 1450. Marcel Reymond holds that the execution of these reliefs was committed to assistants. In 1576 a new altar was ordered, and Donatello's bronzes were dispersed. In 1895 a reconstruction of Donatello's altar was made, setting the parts in place according to what is supposed to have been the original design. 2. _St. Philip._ (Nanni di Banco.) Marble statue in niche on outside of Or San Michele, Florence. The date is uncertain; Marcel Reymond considers it one of Nanni's oldest works, placing it before 1408. 3. _St. John the Baptist._ (Donatello.) Bas-relief in pietra serena in the National Museum (Bargello), Florence. No date is assigned. 4. _The Infant Jesus and St. John._ (Mino da Fiesole.) Detail of marble altarpiece in alto relievo in cathedral of Fiesole, being a part of the monument of Bishop Salutati. Ordered in 1462. 5. _Boys with Cymbals._ (Lucca della Robbia.) One of the marble bas-reliefs ornamenting the organ gallery for the Florence cathedral. Organ gallery begun in 1431, finished 1440. Removed from cathedral in 1688. Reliefs put in Uffizi Gallery 1882, and then in the Bargello. Thence taken to the museum of the Duomo, where they are now to be seen, set up in place on the reconstructed gallery.