I. Petrarch by Morris Bishop -- II. Machiavelli by Garrett Mattingly -- III. The Young Michelangelo by Kenneth Clark -- IV. Lorenzo de' Medici by Ralph Roeder -- V. Leonardo da Vinci by J. Bronowski -- VI. Pope Pius II by Iris Origo -- VII. Doge Francesco Foscari by H. R. Trevor-Roper -- VIII. Federigo da Montefeltro by Denis Mack Smith -- IX. Beatrice and Isabella d'Este by Maria Bellonci.