Contents

1. Preface
2. 1870
   1. 1. Marx to Engels. 20 July
   2. 2. Engels to Marx. 22 July
   3. 3. Marx to Eugen Oswald. 26 July
   4. 4. Marx to Engels. 28 July
   5. 5. Marx to Paul and Laura Lafargue. 28 July
   6. 6. Marx to Engels. 29 July
   7. 7. Marx to Wilhelm Liebknecht. 29 July
   8. 8. Engels to Marx. 31 July
   9. 9. Marx to Engels. 1 August
   10. 10. Marx to Johann Philipp Becker. 2 August
   11. 11. Marx to Eugen Oswald. 2 August
   12. 12. Engels to Marx. 3 August
   13. 13. Marx to Engels. 3 August
   14. 14. Marx to Eugen Oswald. 3 August
   15. 15. Marx to Engels. 4 August
   16. 16. Engels to Marx. 5 August
   17. 17. Marx to Eugen Oswald. 5 August
   18. 18. Marx to Hermann Jung. 6 August
   19. 19. Marx to Eugen Oswald. 7 August
   20. 20. Marx to Engels. 8 August
   21. 21. Engels to Marx. 10 August
   22. 22. Marx to Engels. 12 August
   23. 23. Marx to Hermann Jung. 12 August
   24. 24. Marx to Engels. 15 August
   25. 25. Engels to Marx. 15 August
   26. 26. Engels to Jenny Marx. 15 August
   27. 27. Marx to Engels. 17 August
   28. 28. Engels to Marx. 20 August
   29. 29. Marx to Engels. 22 August
   30. 30. Marx to Engels. 30 August
   31. 31. Marx to Friedrich Adolph Sorge. 1 September
   32. 32. Marx to Engels. 2 September
   33. 33. Marx to Sigfrid Meyer. 2 September
   34. 34. Engels to Marx. 4 September
   35. 35. Marx to Eugen Oswald. 4 September
   36. 36. Marx to Engels. 6 September
   37. 37. Engels to Marx. 7 September
   38. 38. Marx to Engels. 10 September
   39. 39. Engels to Marx. 12 September
   40. 40. Marx to Edward Spencer Beesly. 12 September
   41. 41. Engels to Marx. 13 September
   42. 42. Marx to Engels. 14 September
   43. 43. Marx to Johann Philipp Becker. 14 September
   44. 44. Marx to César De Paepe. 14 September
   45. 45. Marx to Ludwig Kugelmann. 14 September
   46. 46. Marx to Eugen Oswald. 14 September
   47. 47. Marx to Johann Philipp Becker. 15 September
   48. 48. Marx to Engels. 16 September
   49. 49. Marx to Edward Spencer Beesly. 16 September
   50. 50. Marx to Eugen Oswald. 23 September
   51. 51. Marx to Edward Spencer Beesly. 19 October
   52. 52. Marx to Peter Imandt. 11 November
   53. 53. Marx to the Dutch and Flemish Internationals. Between 3 and 9 December gj 54. Marx to Ludwig Kugelmann. 13 December
   54. 55. Engels to Frederick Greenwood. 17 December
   55. 56. Engels to Natalie Liebknecht. 19 December
3. 1871
   1. 57. Marx to Natalie Liebknecht. 13 January
   2. 58. Marx to Hermann Jung. 18 January
   3. 59. Marx to G. Julian Harney. 21 January
   4. 60. Marx to Sigfrid Meyer. 21 January
   5. 61. Marx to Friedrich Adolph Sorge. 21 January
   6. 62. Marx to Johann Jacoby. 4 February
   7. 63. Marx to Ludwig Kugelmann. 4 February
   8. 64. Marx to Paul Lafargue. 4 February
   9. 65. Marx to Pyotr Lavrov. 27 February
   10. 66. Marx to Natalie Liebknecht. 2 March
   11. 67. Engels to Karl Klein and Friedrich Moll. 10 March
   12. 68. Engels to Rudolf Engels. 10 March
   13. 69. Marx to Paul Lafargue. 23 March
   14. 70. Marx to Peter Imandt. 30 March
   15. 71. Engels to Philippe Coenen. 5 April
   16. 72. Engels to Wilhelm Liebknecht. 5 April
   17. 73. Marx to Wilhelm Liebknecht. 6 April
   18. 74. Marx to Wilhelm Liebknecht. Around 10 April
   19. 75. Marx to Ludwig Kugelmann. 12 April
   20. 76. Marx to Wilhelm Liebknecht. 13 April
   21. 77. Engels to Wilhelm Liebknecht. 13 April
   22. 78. Marx to Ludwig Kugelmann. 17 April
   23. 79. Engels to Wilhelm Liebknecht. 20 April
   24. 80. Engels to Francisco Mora. Around 20 April
   25. 81. Marx to Friedrich Adolph Sorge. Around20 April
   26. 82. Marx to Léo Frankel. Around 26 April
   27. 83. Engels to Ludwig Kugelmann. 28 April
   28. 84. Marx to Wilhelm Liebknecht. 4 May
   29. 85. Engels to Wilhelm Liebknecht. 4 May
   30. 86. Marx to Wilhelm Liebknecht. 5 May
   31. 87. Engels to Hermann Jung. 10 May
   32. 88. Marx to Leo Frankel and Louis Eugène Varlin. 13 May
   33. 89. Marx to Edward Spencer Beesly. 12 June
   34. 90. Marx to Nikolai Danielson. 13 June
   35. 91. Marx to His Daughters Jenny, Laura and Eleanor. 13 June
   36. 92. Engels to Elisabeth Engels. 16 June
   37. 93. Marx to Ludwig Kugelmann. 18 June
   38. 94. Marx to an Unknown Addressee. 19 June
   39. 95. Engels to Wilhelm Liebknecht. 22 June
   40. 96. Engels to Carlo Cafiero. 1- 3 July
   41. 97. Engels to Wilhelm Liebknecht. 10 July
   42. 98. Marx to Léon Bigot. 11 July
   43. 99. Marx to Pyotr Lavrov. 12 July
   44. 100. Marx to A. O. Rutson. 12 July
   45. 101. Engels to Carlo Cafiero. 16 July
   46. 102. Marx to Eugen Oswald. 21 July
   47. 103. Marx to Nikolai Danielson. 22 July
   48. 104. Marx to Eugen Oswald. 24 July
   49. 105. Marx to Charles Caron. 26 July
   50. 106. Marx to Ludwig Kugelmann. 27 July
   51. 107. Engels to Wilhelm Liebknecht. Not later than 27 July
   52. 108. Marx to Nikolai Utin. 27 July
   53. 109. Engels to Carlo Cafiero. 28 July
   54. 110. Marx to Adolphe Hubert. 28 July
   55. 111. Engels to the Mother Superior of the Convent of the Sisters of Providence in Hampstead. Early August
   56. 112. Engels to Philippe Coenen. 4 August
   57. 113. Engels to Pyotr Lavrov. 9 August
   58. 114. Marx to Theodor Koll. 10 August
   59. 115. Marx to Adolphe Hubert. 10 August
   60. 116. Marx to Hermann Jung. 14 August
   61. 117. Marx to Adolphe Hubert. Not before 14 August
   62. 118. Engels to Wilhelm Liebknecht. Mid-August
   63. 119. Engels to Marx. 18 August
   64. 120. Marx to Engels. 19 August
   65. 121. Marx to Engels. 21 August
   66. 122. Engels to Marx. 23 August
   67. 123. Marx to Engels. 24 August
   68. 124. Marx to Friedrich Boite. 25 August
   69. 125. Marx to Jenny Marx. 25 August
   70. 126. Marx to Hermann Meyer. Around 25 August
   71. 127. Marx to Moncure Daniel Conway. 29 August
   72. 128. Engels to Pyotr Lavrov. 3 September
   73. 129. Marx to Friedrich Adolph Sorge. 5 September
   74. 130. Marx to Collet Dobson Collet. 6 September
   75. 131. Marx to Engels. 8 September
   76. 132. Engels to Miller & Richard. After 9 September
   77. 133. Engels to Wilhelm Liebknecht. 11 September
   78. 134. Marx to Friedrich Adolph Sorge. 12 September
   79. 135. Engels to Pyotr Lavrov. 12 September
   80. 136. Marx to Hermann Jung. 13 September
   81. 137. Marx to Adolphe Hubert. 15 September
   82. 138. Marx to Jenny Marx. 23 September
   83. 139. Marx to Gustav Kwasniewski. 29 September
   84. 140. Engels to Pyotr Lavrov. 5 October
   85. 141. Marx to Hermann Jung. 11 October
   86. 142. Marx to Hermann Jung. 13 October
   87. 143. Marx to John Hales. 14 October
   88. 144. Marx to Edward Spencer Beesly. 19 October
   89. 145. Marx to Hermann Jung. 19 October
   90. 146. Marx to Hermann Jung. 20 October
   91. 147. Engels to Elisabeth Engels. 21 October
   92. 148. Marx to Edouard Vaillant. 22 October
   93. 149. Marx to Hermann Jung. Around 25 October
   94. 150. Marx to Hermann Jung. End of October
   95. 151. Engels to Wilhelm Liebknecht. 4 November
   96. 152. Marx to Hermann Jung. 4 November
   97. 153. Marx to Friedrich Adolph Sorge. 6 November
   98. 154. Marx to Ferdinand Jozewicz. 6 November
   99. 155. Marx to Nikolai Danielson. 9 November
   100. 156. Marx to Friedrich Adolph Sorge. 9 November
   101. 157. Marx to Ludwig Kugelmann. 9 November
   102. 158. Marx to Carl Speyer. 10 November
   103. 159. Engels to Theodor Cuno. 13 November
   104. 160. Marx to Hermann Jung. 16 November
   105. 161. Marx to Wilhelm Liebknecht. 17 November
   106. 162. Marx to Jules Johannard. 18 November
   107. 163. Marx to Hermann Jung. 18 November
   108. 164. Marx to Adolphe Hubert. 22 November
   109. 165. Marx to Friedrich Bolte. 23 November
   110. 166. Engels to Carmelo Palladino. 23 November
   111. 167. Marx to César De Paepe. 24 November
   112. 168. Marx to Laura and Paul Lafargue. 24-25 November
   113. 169. Engels to Paul Lafargue. 25 November
   114. 170. Marx to Juliusz Balaszewicz-Potocki. 25 November
   115. 171. Marx to Juliusz Balaszewicz-Potocki. 29 November
   116. 172. Marx to Friedrich Adolph Sorge. 29 November
   117. 173. Engels to Pyotr Lavrov. 29 November
   118. 174. Engels to Paul Lafargue. 9 December
   119. 175. Engels to Wilhelm Liebknecht. 15 December
   120. 176. Marx to Laura Lafargue. 18 December
   121. 177. Engels to Paul Lafargue. 30 December
4. 1872
   1. 178. Engels to Wilhelm Liebknecht. 2 January
   2. 179. Engels to Wilhelm Liebknecht. 3 January
   3. 180. Marx to Maltman Barry. 7 January
   4. 181. Engels to Carlo Terzaghi. First Version. After 6 January
   5. Second Version. 14- 15 January
   6. 182. Engels to Wilhelm Liebknecht. 18 January
   7. 183. Engels to Pyotr Lavrov. 19 January
   8. 184. Engels to Paul Lafargue. 19 January
   9. 185. Marx to Hermann Jung. 19 January
   10. 186. Engels to Theodor Cuno. 24 January
   11. 187. Engels to Carlo Terzaghi. 29 January
   12. 188. Marx to Ferdinand Jozewicz. 1 February
   13. 189. Marx to Hermann Jung. 1 February
   14. 190. Marx to Maurice Lachâtre and Juste Vernouillet. 9. February
   15. 191. Marx to Adolphe Hubert. 12 February
   16. 192. Marx to Asher & Co. 13 February
   17. 193. Engels to Wilhelm Liebknecht. 15 February
   18. 194. Engels to Johann Philipp Becker. 16 February
   19. 195. Engels to Giuseppe Benedetti. 18 February
   20. 196. Engels to William Burrs. 22 February
   21. 197. Marx to Ferdinand Jozewicz. 24 February
   22. 198. Marx to Hermann Jung. 26 February
   23. 199. Marx to Laura Lafargue. 28 February
   24. 200. Engels to Sigismund Borkheim. Early March
   25. 201. Engels to Louis Pio. 7 March
   26. 202. Marx to Hermann Jung. 7 March
   27. 203. Marx to Friedrich Adolph Sorge. 8 March
   28. 204. Marx to Emile Eudes. 9 March
   29. 205. Engels to Paul Lafargue. 11 March
   30. 206. Engels to Laura Lafargue. 11 March
   31. 207. Engels to Louis Pio. Mid-March
   32. 208. Marx to Friedrich Adolph Sorge. 15 March
   33. 209. Engels to Friedrich Adolph Sorge. 17 March
   34. 210. Marx to Maurice Lachâtre. 18 March
   35. 211. Engels to Cesare Bert. 21 March
   36. 212. Marx to Paul Lafargue. 21 March
   37. 213. Engels to Carlo Terzaghi. 21 March
   38. 214. Marx to Edouard Vaillant. 4 April
   39. 215. Engels to Gennaro Bovio. 16 April
   40. 216. Engels to Theodor Cuno. 22- 23 April
   41. 217. Engels to Wilhelm Liebknecht. 23 April
   42. 218. Marx to Johann Georg Eccarius. 3 May
   43. 219. Engels to Wilhelm Liebknecht. 7 May
   44. 220. Engels to Theodor Cuno. 7-8 May
   45. 221. Engels to Johann Philipp Becker. 9 May
   46. 222. Engels to Wilhelm Liebknecht. 15-22 May
   47. 223. Marx to Friedrich Adolph Sorge. 23 May
   48. 224. Marx to Edouard Vaillant. 24 May
   49. 225. Marx to Friedrich Adolph Sorge. 27 May
   50. 226. Engels to Wilhelm Liebknecht. 27-28 May
   51. 227. Marx to Nikolai Danielson. 28 May
   52. 228. Marx to César De Paepe. 28 May
   53. 229. Marx to Friedrich Adolph Sorge. 29 May
   54. 230. Engels to Wilhelm Liebknecht. 5-6 June
   55. 231. Engels to J. Molesworth. After 5 June
   56. 232. Engels to Cesare Bert. 7 June
   57. 233. Engels to Theodor Cuno. 10 June
   58. 234. Engels to Johann Philipp Becker. 14 June
   59. 235. Engels to Carlo Cafiero. 14 June
   60. 236. Marx to Friedrich Adolph Sorge. 21 June
   61. 237. Marx to Octave van Suetendael. 21 June
   62. 238. Engels to Adolf Hepner. 2 July
   63. 239. Engels to Th. Smart & Co. After 3 July
   64. 240. Engels to Theodor Cuno. 5 July
   65. 241. Marx to Ludwig Kugelmann. 9 July
   66. 242. Engels to Adolf Hepner. 9 July
   67. 243. Engels to Ugo Bartorelli. 18 July
   68. 244. Marx to Ludwig Kugelmann. 23 July
   69. 245. Marx to Ludwig Kugelmann. 29 July
   70. 246. Marx to Hermann Jung. End of July
   71. 247. Engels to Adolf Hepner. 4 August
   72. 248. Engels to Theodor Cuno. 4 August
   73. 249. Engels to Johann Philipp Becker. 5 August
   74. 250. Engels to Walery Wroblewski. 7 August
   75. 251. Marx to Nikolai Danielson. 15 August
   76. 252. Marx to Juste Vernouillet. 15 August
   77. 253. Engels to E. Glaser de Willebrord. 19 August
   78. 254. Engels to Wilhelm Liebknecht. 24 August
   79. 255. Marx to Ludwig Kugelmann. 26 August
   80. 256. Engels to Hermann Jung. Early September
   81. 257. Engels to Maltman Barry. 15 September
   82. 258. Engels to Friedrich Adolph Sorge. 21 September
   83. 259. Engels to Hermann Jung. 1 October
   84. 260. Marx to P. van der Willigen. 4 October
   85. 261. Engels to Friedrich Adolph Sorge. 5 October
   86. 262. Marx to Maurice Lachâtre. 12 October
   87. 263. Marx to Hermann Jung. 14 October
   88. 264. Engels to Friedrich Lessner. 16 October
   89. 265. Engels to Theodor Cuno. 29 October
   90. 266. Engels to Jenny Longuet. 30 October
   91. 267. Engels to Friedrich Adolph Sorge. 2 November
   92. 268. Engels to Friedrich Adolph Sorge. 16 November
   93. 269. Engels to Jenny Longuet. 19 November
   94. 270. Marx to Nikolai Danielson. 25 November
   95. 271. Engels to Friedrich Adolph Sorge. 7 December
   96. 272. Marx to Nikolai Danielson. 12 December
   97. 273. Engels to Friedrich Adolph Sorge. 14 December
   98. 274. Marx to Friedrich Adolph Sorge. 21 December
   99. 275. Marx to William Riley. 23 December
   100. 276. Engels to Adolf Hepner. 30 December
5. 1873
   1. 277. Engels to Friedrich Adolph Sorge. 4 January
   2. 278. Engels to Rudolf Seiffert. Between 15 and 20 January
   3. 279. Marx to Nikolai Danielson. 18 January
   4. 280. Engels to Eugen Oswald. 29 January
   5. 281. Marx to Aristide Fanton. 1 February
   6. 282. Marx to Johann Philipp Becker. 11 February
   7. 283. Marx to Friedrich Bolte. 12 February
   8. 284. Engels to Wilhelm Liebknecht. 12 February
   9. 285. Engels to Maurice Lachâtre. After 14 February
   10. 286. Engels to Natalie Liebknecht. 11 March
   11. 287. Engels to Eugen Oswald. 18 March
   12. 288. Engels to Friedrich Adolph Sorge. 20 March
   13. 289. Engels to Maurice Lachâtre. After 21 March
   14. 290. Marx to Nikolai Danielson. 22 March
   15. 291. Engels to Friedrich Adolph Sorge. 22 March
   16. 292. Marx to Johann Philipp Becker. 7 April
   17. 293. Engels to Friedrich Adolph Sorge. 3 May
   18. 294. Marx to Maurice Lachâtre. 12 May
   19. 295. Marx to Engels. 23 May
   20. 296. Marx to Hugo Heller. 23 May
   21. 297. Engels to Marx. 24 May
   22. 298. Marx to Engels. 25 May
   23. 299. Engels to Marx. 26 May
   24. 300. Engels to Marx. 30 May
   25. 301. Marx to Engels. 31 May
   26. 302. Engels to Friedrich Adolph Sorge. 14 June
   27. 303. Engels to August Bebel. 20 June
   28. 304. Engels to Walter Whitter. Not before 24 June
   29. 305. Engels to Ludwig Kugelmann. 1 July
   30. 306. Marx to Juste Vernouillet. 10 July
   31. 307. Engels to Friedrich Adolph Sorge. 26 July
   32. 308. Marx to Nikolai Danielson. 12 August
   33. 309. Marx to Engels. 29 August
   34. 310. Engels to Marx. 30 August
   35. 311. Marx to Engels. 30 August
   36. 312. Engels to Marx. 3 September
   37. 313. Marx to Benjamin Le Moussu. After 3 September
   38. 314. Marx to Engels. 9 September
   39. 315. Engels to John De Morgan. Around 18 September
   40. 316. Marx to Eugen Oswald. 20 September
   41. 317. Marx to Eugen Oswald. 24 September
   42. 318. Marx to Friedrich Adolph Sorge. 27 September
   43. 319. Engels to Friedrich Adolph Sorge. 25 November
   44. 320. Engels to Marx. 29 November
   45. 321. Marx to Engels. 30 November
   46. 322. Engels to Marx. 5 December
   47. 323. Marx to Engels. 7 December
   48. 324. Engels to Marx. 10 December
   49. 325. Marx to Engels. 11 December
   50. 326. Marx to Thomas Allsop. 23 December
6. Appendices
   1. 1. Jenny Marx to Engels. 10 August 1870
   2. 2. Eleanor Marx to Engels. 12 August 1870
   3. 3. Jenny Marx to Engels. Around 18 August 1870
   4. 4. Jenny Marx to Engels. Around 13 September 1870
   5. 5. Jenny Marx to Peter Imandt. Around 13 June 1871
   6. 6. Jenny Marx ( daughter) to Ludwig Kugelmann. 3 October 1871
   7. 7. Eleanor Marx to Aristide Barré. 10 October 1871
   8. 8. Jenny Marx ( daughter) to Ludwig and Gertrud Kugelmann. 21- 22 December 1871
   9. 9. Eleanor Marx to Wilhelm Liebknecht. 29 December 1871
   10. 10. Jenny Marx ( daughter) to Ludwig Kugelmann. 22 January 1872
   11. 11. Eleanor Marx to Nikolai Danielson. 23 January 1872
   12. 12. Wilhelm Liebknecht to Luigi Stefanoni. 29 February 1872
   13. 13. Jenny Marx ( daughter) to Ludwig Kugelmann. 3 May 1872
   14. 14. Jenny Marx to Wilhelm Liebknecht. 26 May 1872 ..:
   15. 15. Jenny Marx ( daughter) to Ludwig and Gertrud Kugelmann. 27 June 1872
   16. 16. Jenny Marx-Longuet to Ludwig and Gertrud Kugelmann. 23 December 1872
   17. 17. Jenny Marx-Longuet to Ludwig and Gertrud Kugelmann. 12 May 1873
   18. 18. Charles Longuet to Hugo Heller. 23 June 1873
7. NOTES AND INDEXES
   1. Notes
   2. Name Index
   3. Index of Quoted and Mentioned Literature
   4. Index of Periodicals
   5. Subject Index