1870
1. Marx to Engels. 20 July
2. Engels to Marx. 22 July
3. Marx to Eugen Oswald. 26 July
4. Marx to Engels. 28 July
5. Marx to Paul and Laura Lafargue. 28 July
6. Marx to Engels. 29 July
7. Marx to Wilhelm Liebknecht. 29 July
8. Engels to Marx. 31 July
9. Marx to Engels. 1 August
10. Marx to Johann Philipp Becker. 2 August
11. Marx to Eugen Oswald. 2 August
12. Engels to Marx. 3 August
13. Marx to Engels. 3 August
14. Marx to Eugen Oswald. 3 August
15. Marx to Engels. 4 August
16. Engels to Marx. 5 August
17. Marx to Eugen Oswald. 5 August
18. Marx to Hermann Jung. 6 August
19. Marx to Eugen Oswald. 7 August
20. Marx to Engels. 8 August
21. Engels to Marx. 10 August
22. Marx to Engels. 12 August
23. Marx to Hermann Jung. 12 August
24. Marx to Engels. 15 August
25. Engels to Marx. 15 August
26. Engels to Jenny Marx. 15 August
27. Marx to Engels. 17 August
28. Engels to Marx. 20 August
29. Marx to Engels. 22 August
30. Marx to Engels. 30 August
31. Marx to Friedrich Adolph Sorge. 1 September
32. Marx to Engels. 2 September
33. Marx to Sigfrid Meyer. 2 September
34. Engels to Marx. 4 September
35. Marx to Eugen Oswald. 4 September
36. Marx to Engels. 6 September
37. Engels to Marx. 7 September
38. Marx to Engels. 10 September
39. Engels to Marx. 12 September
40. Marx to Edward Spencer Beesly. 12 September
41. Engels to Marx. 13 September
42. Marx to Engels. 14 September
43. Marx to Johann Philipp Becker. 14 September
44. Marx to César De Paepe. 14 September
45. Marx to Ludwig Kugelmann. 14 September
46. Marx to Eugen Oswald. 14 September
47. Marx to Johann Philipp Becker. 15 September
48. Marx to Engels. 16 September
49. Marx to Edward Spencer Beesly. 16 September
50. Marx to Eugen Oswald. 23 September
51. Marx to Edward Spencer Beesly. 19 October
52. Marx to Peter Imandt. 11 November
53. Marx to the Dutch and Flemish Internationals. Between 3 and 9 December
54. Marx to Ludwig Kugelmann. 13 December
55. Engels to Frederick Greenwood. 17 December
56. Engels to Natalie Liebknecht. 19 December
1871
57. Marx to Natalie Liebknecht. 13 January
58. Marx to Hermann Jung. 18 January
59. Marx to G. Julian Harney. 21 January
60. Marx to Sigfrid Meyer. 21 January
61. Marx to Friedrich Adolph Sorge. 21 January
62. Marx to Johann Jacoby. 4 February
63. Marx to Ludwig Kugelmann. 4 February
64. Marx to Paul Lafargue. 4 February
65. Marx to Pyotr Lavrov. 27 February
66. Marx to Natalie Liebknecht. 2 March...
67. Engels to Karl Klein and Friedrich Moll. 10 March
68. Engels to Rudolf Engels. 10 March
69. Marx to Paul Lafargue. 23 March
70. Marx to Peter Imandt. 30 March
71. Engels to Philippe Coenen. 5 April
72. Engels to Wilhelm Liebknecht. 5 April
73. Marx to Wilhelm Liebknecht. 6 April
74. Marx to Wilhelm Liebknecht. Around 10 April
75. Marx to Ludwig Kugelmann. 12 April
76. Marx to Wilhelm Liebknecht. 13 April
77. Engels to Wilhelm Liebknecht. 13 April
78. Marx to Ludwig Kugelmann. 17 April
79. Engels to Wilhelm Liebknecht. 20 April
80. Engels to Francisco Mora. Around 20 April
81. Marx to Friedrich Adolph Sorge. Around20 April
82. Marx to Léo Frankel. Around 26 April
83. Engels to Ludwig Kugelmann. 28 April
84. Marx to Wilhelm Liebknecht. 4 May
85. Engels to Wilhelm Liebknecht. 4 May
86. Marx to Wilhelm Liebknecht. 5 May
87. Engels to Hermann Jung. 10 May
88. Marx to Leo Frankel and Louis Eugène Varlin. 13 May
89. Marx to Edward Spencer Beesly. 12 June
90. Marx to Nikolai Danielson. 13 June
91. Marx to His Daughters Jenny, Laura and Eleanor. 13 June
92. Engels to Elisabeth Engels. 16 June
93. Marx to Ludwig Kugelmann. 18 June
94. Marx to an Unknown Addressee. 19 June
95. Engels to Wilhelm Liebknecht. 22 June
96. Engels to Carlo Cafiero. 1-3 July
97. Engels to Wilhelm Liebknecht. 10 July
98. Marx to Léon Bigot. 11 July
99. Marx to Pyotr Lavrov. 12 July
100. Marx to A. O. Rutson. 12 July
101. Engels to Carlo Cafiero. 16 July
102. Marx to Eugen Oswald. 21 July
103. Marx to Nikolai Danielson. 22 July
104. Marx to Eugen Oswald. 24 July
105. Marx to Charles Caron. 26 July
106. Marx to Ludwig Kugelmann. 27 July
107. Engels to Wilhelm Liebknecht. Not later than 27 July
108. Marx to Nikolai Utin. 27 July
109. Engels to Carlo Cafiero. 28 July
110. Marx to Adolphe Hubert. 28 July
111. Engels to the Mother Superior of the Convent of the Sisters of Providence in Hampstead. Early August
112. Engels to Philippe Coenen. 4 August
113. Engels to Pyotr Lavrov. 9 August
114. Marx to Theodor Koll. 10 August
115. Marx to Adolphe Hubert. 10 August
116. Marx to Hermann Jung. 14 August
117. Marx to Adolphe Hubert. Not before 14 August
118. Engels to Wilhelm Liebknecht. Mid-August
119. Engels to Marx. 18 August
120. Marx to Engels. 19 August
121. Marx to Engels. 21 August
122. Engels to Marx. 23 August
123. Marx to Engels. 24 August
124. Marx to Friedrich Boite. 25 August
125. Marx to Jenny Marx. 25 August
126. Marx to Hermann Meyer. Around 25 August
127. Marx to Moncure Daniel Conway. 29 August
128. Engels to Pyotr Lavrov. 3 September
129. Marx to Friedrich Adolph Sorge. 5 September
130. Marx to Collet Dobson Collet. 6 September
131. Marx to Engels. 8 September
132. Engels to Miller & Richard. After 9 September
133. Engels to Wilhelm Liebknecht. 11 September
134. Marx to Friedrich Adolph Sorge. 12 September
135. Engels to Pyotr Lavrov. 12 September
136. Marx to Hermann Jung. 13 September
137. Marx to Adolphe Hubert. 15 September
138. Marx to Jenny Marx. 23 September
139. Marx to Gustav Kwasniewski. 29 September
140. Engels to Pyotr Lavrov. 5 October
141. Marx to Hermann Jung. 11 October
142. Marx to Hermann Jung. 13 October
143. Marx to John Hales. 14 October
144. Marx to Edward Spencer Beesly. 19 October
145. Marx to Hermann Jung. 19 October
146. Marx to Hermann Jung. 20 October
147. Engels to Elisabeth Engels. 21 October
148. Marx to Edouard Vaillant. 22 October
149. Marx to Hermann Jung. Around 25 October
150. Marx to Hermann Jung. End of October
151. Engels to Wilhelm Liebknecht. 4 November
152. Marx to Hermann Jung. 4 November :
153. Marx to Friedrich Adolph Sorge. 6 November
154. Marx to Ferdinand Jozewicz. 6 November
155. Marx to Nikolai Danielson. 9 November
156. Marx to Friedrich Adolph Sorge. 9 November
157. Marx to Ludwig Kugelmann. 9 November
158. Marx to Carl Speyer. 10 November
159. Engels to Theodor Cuno. 13 November
160. Marx to Hermann Jung. 16 November
161. Marx to Wilhelm Liebknecht. 17 November
162. Marx to Jules Johannard. 18 November
163. Marx to Hermann Jung. 18 November
164. Marx to Adolphe Hubert. 22 November
165. Marx to Friedrich Bolte. 23 November
166. Engels to Carmelo Palladino. 23 November
167. Marx to César De Paepe. 24 November
168. Marx to Laura and Paul Lafargue. 24-25 November
169. Engels to Paul Lafargue. 25 November
170. Marx to Juliusz Balaszewicz-Potocki. 25 November
171. Marx to Juliusz Balaszewicz-Potocki. 29 November
172. Marx to Friedrich Adolph Sorge. 29 November
173. Engels to Pyotr Lavrov. 29 November 275 174. Engels to Paul Lafargue. 9 December
175. Engels to Wilhelm Liebknecht. 15 December
176. Marx to Laura Lafargue. 18 December
177. Engels to Paul Lafargue. 30 December
1872
178. Engels to Wilhelm Liebknecht. 2 January
179. Engels to Wilhelm Liebknecht. 3 January
180. Marx to Maltman Barry. 7 January
181. Engels to Carlo Terzaghi. First Version. After 6 January
Second Version. 14-15 January
182. Engels to Wilhelm Liebknecht. 18 January
183. Engels to Pyotr Lavrov. 19 January
184. Engels to Paul Lafargue. 19 January
185. Marx to Hermann Jung. 19 January
186. Engels to Theodor Cuno. 24 January
187. Engels to Carlo Terzaghi. 29 January
188. Marx to Ferdinand Jozewicz. 1 February
189. Marx to Hermann Jung. 1 February
190. Marx to Maurice Lachâtre and Juste Vernouillet. 9. February....
191. Marx to Adolphe Hubert. 12 February
192. Marx to Asher & Co. 13 February
193. Engels to Wilhelm Liebknecht. 15 February
194. Engels to Johann Philipp Becker. 16 February
195. Engels to Giuseppe Benedetti. 18 February
196. Engels to William Burrs. 22 February
197. Marx to Ferdinand Jozewicz. 24 February
198. Marx to Hermann Jung. 26 February
199. Marx to Laura Lafargue. 28 February
200. Engels to Sigismund Borkheim. Early March
201. Engels to Louis Pio. 7 March
202. Marx to Hermann Jung. 7 March
203. Marx to Friedrich Adolph Sorge. 8 March
204. Marx to Emile Eudes. 9 March
205. Engels to Paul Lafargue. 11 March
206. Engels to Laura Lafargue. 11 March
207. Engels to Louis Pio. Mid-March
208. Marx to Friedrich Adolph Sorge. 15 March
209. Engels to Friedrich Adolph Sorge. 17 March
210. Marx to Maurice Lachâtre. 18 March
211. Engels to Cesare Bert. 21 March
212. Marx to Paul Lafargue. 21 March
213. Engels to Carlo Terzaghi. 21 March
214. Marx to Edouard Vaillant. 4 April
215. Engels to Gennaro Bovio. 16 April
216. Engels to Theodor Cuno. 22-23 April
217. Engels to Wilhelm Liebknecht. 23 April
218. Marx to Johann Georg Eccarius. 3 May
219. Engels to Wilhelm Liebknecht. 7 May....
220. Engels to Theodor Cuno. 7-8 May
221. Engels to Johann Philipp Becker. 9 May
222. Engels to Wilhelm Liebknecht. 15-22 May
223. Marx to Friedrich Adolph Sorge. 23 May
224. Marx to Edouard Vaillant. 24 May
225. Marx to Friedrich Adolph Sorge. 27 May
226. Engels to Wilhelm Liebknecht. 27-28 May
227. Marx to Nikolai Danielson. 28 May
228. Marx to César De Paepe. 28 May
229. Marx to Friedrich Adolph Sorge. 29 May
230. Engels to Wilhelm Liebknecht. 5-6 June
231. Engels to J. Molesworth. After 5 June
232. Engels to Cesare Bert. 7 June
233. Engels to Theodor Cuno. 10 June
234. Engels to Johann Philipp Becker. 14 June
235. Engels to Carlo Cafiero. 14 June
236. Marx to Friedrich Adolph Sorge. 21 June
237. Marx to Octave van Suetendael. 21 June
238. Engels to Adolf Hepner. 2 July
239. Engels to Th. Smart & Co. After 3 July
240. Engels to Theodor Cuno. 5 July
241. Marx to Ludwig Kugelmann. 9 July
242. Engels to Adolf Hepner. 9 July
243. Engels to Ugo Bartorelli. 18 July
244. Marx to Ludwig Kugelmann. 23 July
245. Marx to Ludwig Kugelmann. 29 July
246. Marx to Hermann Jung. End of July
247. Engels to Adolf Hepner. 4 August
248. Engels to Theodor Cuno. 4 August
249. Engels to Johann Philipp Becker. 5 August
250. Engels to Walery Wroblewski. 7 August
251. Marx to Nikolai Danielson. 15 August
252. Marx to Juste Vernouillet. 15 August
253. Engels to E. Glaser de Willebrord. 19 August
254. Engels to Wilhelm Liebknecht. 24 August
255. Marx to Ludwig Kugelmann. 26 August
256. Engels to Hermann Jung. Early September
257. Engels to Maltman Barry. 15 September
258. Engels to Friedrich Adolph Sorge. 21 September
259. Engels to Hermann Jung. 1 October
260. Marx to P. van der Willigen. 4 October
261. Engels to Friedrich Adolph Sorge. 5 October
262. Marx to Maurice Lachâtre. 12 October
263. Marx to Hermann Jung. 14 October
264. Engels to Friedrich Lessner. 16 October
265. Engels to Theodor Cuno. 29 October
266. Engels to Jenny Longuet. 30 October
267. Engels to Friedrich Adolph Sorge. 2 November
268. Engels to Friedrich Adolph Sorge. 16 November
269. Engels to Jenny Longuet. 19 November
270. Marx to Nikolai Danielson. 25 November
271. Engels to Friedrich Adolph Sorge. 7 December
272. Marx to Nikolai Danielson. 12 December
273. Engels to Friedrich Adolph Sorge. 14 December
274. Marx to Friedrich Adolph Sorge. 21 December
275. Marx to William Riley. 23 December
276. Engels to Adolf Hepner. 30 December
1873
277. Engels to Friedrich Adolph Sorge. 4 January
278. Engels to Rudolf Seiffert. Between 15 and 20 January
279. Marx to Nikolai Danielson. 18 January
280. Engels to Eugen Oswald. 29 January
281. Marx to Aristide Fanton. 1 February
282. Marx to Johann Philipp Becker. 11 February
283. Marx to Friedrich Bolte. 12 February
284. Engels to Wilhelm Liebknecht. 12 February
285. Engels to Maurice Lachâtre. After 14 February
286. Engels to Natalie Liebknecht. 11 March
287. Engels to Eugen Oswald. 18 March
288. Engels to Friedrich Adolph Sorge. 20 March
289. Engels to Maurice Lachâtre. After 21 March
290. Marx to Nikolai Danielson. 22 March
291. Engels to Friedrich Adolph Sorge. 22 March
292. Marx to Johann Philipp Becker. 7 April
293. Engels to Friedrich Adolph Sorge. 3 May
294. Marx to Maurice Lachâtre. 12 May
295. Marx to Engels. 23 May
296. Marx to Hugo Heller. 23 May
297. Engels to Marx. 24 May
298. Marx to Engels. 25 May
299. Engels to Marx. 26 May
300. Engels to Marx. 30 May
301. Marx to Engels. 31 May
302. Engels to Friedrich Adolph Sorge. 14 June
303. Engels to August Bebel. 20 June
304. Engels to Walter Whitter. Not before 24 June
305. Engels to Ludwig Kugelmann. 1 July
306. Marx to Juste Vernouillet. 10 July
307. Engels to Friedrich Adolph Sorge. 26 July
308. Marx to Nikolai Danielson. 12 August
309. Marx to Engels. 29 August
310. Engels to Marx. 30 August
311. Marx to Engels. 30 August
312. Engels to Marx. 3 September
313. Marx to Benjamin Le Moussu. After 3 September
314. Marx to Engels. 9 September
315. Engels to John De Morgan. Around 18 September
316. Marx to Eugen Oswald. 20 September
317. Marx to Eugen Oswald. 24 September
318. Marx to Friedrich Adolph Sorge. 27 September
319. Engels to Friedrich Adolph Sorge. 25 November
320. Engels to Marx. 29 November
321. Marx to Engels. 30 November
322. Engels to Marx. 5 December
323. Marx to Engels. 7 December
324. Engels to Marx. 10 December
325. Marx to Engels. 11 December
326. Marx to Thomas Allsop. 23 December
APPENDICES
1. Jenny Marx to Engels. 10 August 1870
2. Eleanor Marx to Engels. 12 August 1870
3. Jenny Marx to Engels. Around 18 August 1870
4. Jenny Marx to Engels. Around 13 September 1870
5. Jenny Marx to Peter Imandt. Around 13 June 1871
6. Jenny Marx (daughter) to Ludwig Kugelmann. 3 October 1871
7. Eleanor Marx to Aristide Barré. 10 October 1871
8. Jenny Marx (daughter) to Ludwig and Gertrud Kugelmann. 21-22 December 1871
9. Eleanor Marx to Wilhelm Liebknecht. 29 December 1871
10. Jenny Marx (daughter) to Ludwig Kugelmann. 22 January 1872
11. Eleanor Marx to Nikolai Danielson. 23 January 1872
12. Wilhelm Liebknecht to Luigi Stefanoni. 29 February 1872
13. Jenny Marx (daughter) to Ludwig Kugelmann. 3 May 1872
14. Jenny Marx to Wilhelm Liebknecht. 26 May 1872 ..:
15. Jenny Marx (daughter) to Ludwig and Gertrud Kugelmann. 27 June 1872
16. Jenny Marx-Longuet to Ludwig and Gertrud Kugelmann. 23 December 1872
17. Jenny Marx-Longuet to Ludwig and Gertrud Kugelmann. 12 May 1873
18. Charles Longuet to Hugo Heller. 23 June 1873
NOTES AND INDEXES
Notes
Name Index
Index of Quoted and Mentioned Literature
Index of Periodicals 758 Subject Index