| Third page of Marx's letter to Engels of 4 November 1864 | 13 |
| Pages of Marx's Notebook for 1864-65 with the rough draft of his letter to Léon Fontaine of 15 April 1865 | 145 |
| Karl Marx with his daughter Jenny. End of March 1866, Margate | 248-9 |
| Frederick Engels. 1860s. Manchester | 296-7 |
| The British Museum | 328-9 |
| First page of Engels' letter to Marx of 4 April 1867 | 353 |
| Karl Marx. End of April 1867. Hanover | 360-1 |
| Marx's letter to Engels of 16 August 1867 | 403 |
| Otto Meissner Publishing House in Hamburg where Marx brought the manuscript of Volume One of Capital in 1867 | 488-9 |
| A page from the album of Jenny, Marx's daughter, containing Marx's 'Confession' | 569 |