| Frederick Engels. 1856. Manchester | 6-7 |
| The second and third pages of Marx's letter to Engels of 16 April 1856 | 39 |
| The first page of Engels' letter to Marx of 23 May 1856 | 47 |
| Grafton Terrace, Maitland Palk, Haverstock Hill, London, where Marx lived from October 1856 to 1868 | 77 |
| Chart of cotton prices from 1 January 1857 compiled by Engels | 205 |
| The reading-room of the British Museum, London, where Marx worked | 245 |
| The second page of Marx's letter to Engels of 2 April 1858 | 299 |
| Jenny Marx, daughter of Karl Marx. Late 1850s-early 1860s | 316-17 |
| Chetham's Library in Manchester where Marx worked in the 1840s and Engels in the 1840s-60s. General view and part of the reading-room | 468-69 |
| Wilhelm Liebknecht, Conrad Schramm, Ferdinand Lassalle | 488-89 |
