LIST OF ILLUSTRATIONS
| William Cavendish, Duke of Newcastle | Frontispiece | |
| The Castle of the Ogles. Inherited by Newcastle from his Mother. From his Book on Horsemanship | Facing page | 4 |
| Welbeck. Double-page Engraving in Newcastle’s Book on Horsemanship | ” | 24 |
| Bolsover Castle. From Newcastle’s Book on Horsemanship | ” | 30 |
| William Cavendish, Duke of Newcastle. From an Engraving by Wm. Holl. After a Painting by Van Dyck | ” | 72 |
| William Cavendish, Marquis of Newcastle, with his Seals and Autographs. From an Original by Van Dyck | ” | 112 |
| Training with the Right Hand—Bolsover Castle in the Background. From Newcastle’s Book on Horsemanship | ” | 170 |
| Margaret, Duchess of Newcastle. From an Engraving by Alais. After a Painting by Diepenbeck [1]. | ” | 174 |
| The Duke and Duchess of Newcastle and their Family. By Diepenbeck | ” | 224 |
| “Art Avails Much More” than the Bridle. From Newcastle’s Book on Horsemanship | ” | 230 |
| “Aids.” From Newcastle’s Book on Horsemanship | ” | 234 |
| Margaret, Duchess of Newcastle. From the Frontispiece to one of her books by Diepenbeck | ” | 248 |
| Margaret, Duchess of Newcastle. From an Engraving by G. P. Harding. After a Painting by A. Diepenbeck | ” | 258 |
| Monument of the Duke and Duchess of Newcastle in Westminster Abbey | ” | 274 |
[1] Abraham Diepenbeck (1599-1675) was a pupil of Rubens. He painted in oils, he was also an engraver, and he painted a large number of windows for churches.