| D’Alembert | Frontispiece |
| From an Engraving after Pujos. |
| Diderot | To face p.32 |
| From an Engraving by Henriquez, after the Portrait by Vanloo. |
| Galiani | " 62 |
| From a Print. |
| Vauvenargues | " 96 |
| From a Print in the Bibliothèque Nationale, Paris. |
| D’Holbach | " 118 |
| From a Portrait in the Musée Condé, Chantilly. |
| Grimm | " 150 |
| From an Engraving, after Carmontelle, in the Bibliothèque Nationale, Paris. |
| Helvétius | " 176 |
| From an Engraving by St. Aubin, after the Portrait by Vanloo. |
| Turgot | " 206 |
| From an Engraving by Le Beau, after the Portrait by Troy. |
| Beaumarchais | " 236 |
| From an Engraving, after Michon, in the Bibliothèque Nationale, Paris. |
| Condorcet | " 268 |
| From an Engraving by Lemort, after the Bust by St.Aubin. |
