| Beginning of the year | Lenin reads lectures on philosophy to a Bolshevik circle in Paris. |
| January-June | Lenin works in the National Library and the Sorbonne Library of Paris University on literature dealing with problems of philosophy and natural science. |
| January 2 (February 6) | In a letter to A. I. Ulyanova-Yelizarova, Lenin acknowledges receipt of the first pages of the proofs of Materialism and Empirio-criticism. |
| January-April | Lenin works on the proofs of Materialism and Empirio-criticism. |
| February 1 (14) | At a meeting of the editorial board of Proletary Lenin demands that the board publicly oppose Lunacharsky’s god-building. An editorial article against god-building (“The Wrong Road”) was printed on February 12 (25) in Proletary, No. 42. |
| February 4 or 6 (17 or 18) | In a letter to A. I. Ulyanova-Yelizarova, Lenin sends corrections to the current page-proofs of the book, reports that 27 pages of the manuscript are missing from the proofs and firmly requests that care be taken to see that nothing is omitted in printing the book. |
| February 10 (23) | In a letter to A. I. Ulyanova-Yelizarova, Lenin acknowledges receipt of the 8th and 9th printed sheets of page-proofs; he mentions that there were no omissions, that the proof-reading of the sheets has been done well, and he sends his corrections to them. |
| February 2 (March 9) | Lenin sends A. I. Ulyanova-Yelizarova a letter containing corrections to the 10th and 11th printed sheets. Lenin reports about the break with A. Bogdanov and A. V. Lunacharsky and asks that in reading the page-proofs of the book the formulations against them should not be toned down and that the issue of the book should be expedited; he thanks I. I. Skvortsov-Stepanov for his help in publishing the book. |
| February 27 (March 12) | In a letter to A. I. Ulyanova-Yelizarova, Lenin sends a list of the misprints in printed sheets 6-9 and 13, and again asks for the publication of the book to be expedited. In a postscript Lenin again insists that nothing shall be toned down in the passages opposing Bogdanov, Lunacharsky and other Machists. |
| March 8-9 (21-22) | In a letter to A. I. Ulyanova-Yelizarova, Lenin again requests that on no account should the parts opposing Bogdanov, Lunacharsky and others be toned down and sends a list of misprints in printed sheets 1-5 of the book. |
| March 10 or 11 (23 or 24) | Lenin sends to A. I. Ulyanova-Yelizarova in Moscow the addition “From What Angle Did N. G. Chernyshevsky Criticise Kantianism?” to Section 1, Chapter Four of Materialism and Empirio-criticism. |
| March 13 (26) | Lenin sends A. I. Ulyanova-Yelizarova a list of the misprints in printed sheets 15-18 of page proofs and asks to be informed when the book is expected to appear. |
| March 23 (April 5) | Lenin sends A. I. Ulyanova-Yelizarova a list of misprints in the 14th printed sheet of the proofs and asks that in the proofs the phrase about Vernadsky “materialist-thinker” should be changed to “naturalist thinker”, or to mention it in the list of misprints. |
| March 24 (April 6) | In a letter to A. I. Ulyanova-Yelizarova, Lenin acknowledges receipt of printed sheets 10-12 of the book and the 21st printed sheet of the proofs, and he sends a list of the misprints in them. |
| March 26 (April 8) | In a letter to A. I. Ulyanova-Yelizarova, Lenin acknowledges receipt of the 22nd printed sheet of the proofs and informs her of the dispatch of the corrections to it; he asks that everything possible be done for the book Materialism and Empirio-criticism to appear in the first half of April. “I have not only literary but also serious political obligations connected with its publication,” wrote Lenin. |
| April 21 (May 4) | In a letter to I. F. Dubrovinsky, Lenin informs him that he has received news that Materialism and Empirio-criticism has appeared, and he promises to send it to him in Paris by April 25-26 (May 8-9). |
| Between April 29 and May 4 (May 12 and 17) | Lenin’s book Materialism and Empirio-criticism. Critical Comments on a Reactionary Philosophy is issued by the Zveno Publishers, Moscow. |
| May 4 (17) | Lenin sends Rosa Luxemburg his book Materialism and Empirio-criticism and asks that the publication of the book should be mentioned in the magazine Die Neue Zeit, which was done (see Die Neue Zeit, No. 2, October 8, 1909, p. 64). |
| May 8 (21) | In a letter to M. A. Ulyanova, Lenin acknowledges receipt of the book Materialism and Empirio-criticism and comments favourably on the way the book was published. |
| May, before the 12th (25th) | Lenin presents a copy of Materialism and Empirio-criticism to V. F. Gorin (Galkin). |
| May 13 (26) | In a letter to A. I. Ulyanova-Yelizarova, Lenin acknowledges receipt of the book Materialism and Empirio-criticism, comments favourably on the way it was published, and writes about the imminent split with the Otzovists and Ultimatists. |
| May-September | The magazines Vozrozhdeniye (Rebirth), No. 7-8, Sovremenny Mir (Modern World), No. 7, Kritickeskoye Obozreniye (Critical Review), issue V, and the newspaper Russkiye Vedomosti (Russian Recorder), No. 22, publish reviews by bourgeois and Menshevik authors of Lenin’s book Materialism and Empirio-criticism. |
| June 5 (18) | The newspaper Odesskoye Obozreniye (Odessa Review), No. 436, carries a note by V. V. Vorovsky on V. I. Lenin’s book; because of the censorship the note was ostensibly devoted to a book by Max Verworn, Natural Science and World Outlook, The Problem of Life, Moscow, 1909. |
| Beginning of the summer | Lenin sends a copy of Materialism and Empirio-criticism to I. I. Skvortsov-Stepanov. |
| Summer | In the summer Lenin visits Paul Lafargue and talks with him on philosophical problems and his book Materialism and Empirio-criticism. |
| Beginning of the year | Lenin gives lectures on philosophy at a Bolshevik study group in Paris. |
| January 7 (20) | Lenin’s article “How the Socialist-Revolutionaries Sum Up the Revolution and How the Revolution Has Summed Them Up” is published in Proletary, No. 41. |
| January 22 (February 4) | Lenin speaks in Paris on the political situation in Russia. |
| January 28 (February 10) | Lenin’s article “On the Road” is published as a leader in the newspaper Sotsial-Demokrat, No. 2. |
| February 1 (14) | At a meeting of the editorial board of Proletary Lenin demands an open attack by the board on the god-building preached by Lunacharsky. |
| February 12 (25) | Lenin’s comment on the article “Questions of the Day”, directed against otzovism, is published in Proletary, No. 42. |
| February 17-23 (March 2-8) | Lenin is on holiday at Nice. |
| March 5 (18) | Lenin speaks in Paris at a meeting of political emigrants on the Paris Commune of 1871. |
| March 9 and 21 (March 22, and April 3) | Lenin’s article “The Aim of the Proletarian Struggle in Our Revolution” is published in Nos. 3 and 4 of Sotsial-Demokrat. |
| March 10 or 11 (23 or 24) | Lenin sends a “Supplement to Chapter Four. Section 1. From What Angle did N. G. Chernyshevsky Criticise Kantianism?” to Moscow for his book Materialism and Empirio-criticism. |
| Not earlier than March 23 (April 5) | On behalf of the C.C. of the R.S.D.L.P. Lenin sends a protest to the Executive Committee of the German Social-Democratic Workers’ Party against the distortion by Vorwärts of the essence of the differences among the Russian Social-Democrats. |
| April 4 (17) | Lenin’s article “A Caricature of Bolshevism” is published in the Supplement to Proletary, No. 44. |
| April 8 (21) | Lenin’s article “The ‘Leftward Swing’ of the Bourgeoisie and the Tasks of the Proletariat” is published in Proletary, No. 44. |
| Between April 29 and May 4 (May 12 and 17) | Lenin’s book Materialism and Empirio-criticism. Critical Comments on a Reactionary Philosophy is published in Moscow. |
| End of April-first half of June | Lenin makes preparations for the conference of the extended editorial board of Proletary. |
| May 8 (21) | Lenin speaks in Paris at the Proletary club on the subject of “Religion and the Workers’ Party”. |
| May 13 (26) | Lenin’s article “The Attitude of the Workers’ Party to Religion” is published as a leader in Proletary, No. 45. |
| June 4 (17) | Lenin’s article “Classes and Parties in Their Attitude to Religion and the Church” is published in Sotsial-Demokrat, No. 6. |
| Not later than June 7 (20) | Lenin holds a private meeting of members of the editorial board of Proletary with representatives from local Social-Democratic organisations, in which he reports on the state of affairs in the Party. |
| June 8-17 (21-30) |
Lenin presides over the conference of the extended editorial board of Proletary, takes part in the discussion, moves amendments to the resolutions and submits draft resolutions on particular questions. On the main questions the conference adopted Lenin’s resolutions. |
| July 3 (16) | “Report on the Conference of the Extended Editorial Board of Proletary”, written by Lenin, is published in a Supplement to Proletary, No. 46. |
| July 11 (24) | Lenin’s articles “The Tsar Visits Europe and Members of the Black-Hundred Duma Visit England” (leader) and “The Liquidation of Liquidationism” are published in Proletary, No. 46. |
| July | In a talk with the Secretary of the Russian section of the Central Committee Lenin gives instructions on the struggle against provocateurs who worm their way into Party organisations. |
| End of July-August | Lenin goes away on holiday with his family (N. K. Krupskaya, her mother and M. I. Ulyanova) to the village of Bonbon (department of Seineet-Marne) near Paris. |
| August 5 (18) |
In a letter to the organisers of the Capri school Lenin declines to give lectures at the school, and invites the students to come to Paris to attend lectures by Bolshevik lecturers. In a letter to the Business Commission of the Bolshevik Centre Lenin objects to any aid being given to Trotsky for the publication of his newspaper Pravda in Vienna. |
| Middle of August | Lenin sends to the Bureau Abroad of the Central Committee a secret circular he has received from the International Socialist Bureau regarding organisation of meetings of protest against the imperialist aggressive policy of the Spanish Government in Morocco. |
| August 17 (30) | In a reply to the students at the Capri school, Lenin explains the anti-Party character of the school, repeats his refusal to deliver lectures in it and invites them to come to Paris. |
| August | Lenin takes part in the work of the Promotion Commission for the Social-Democratic group in the Third Duma. |
| Summer | Lenin visits Paul Lafargue and discusses his book Materialism and Empirio-criticism with him. |
| The first half of September |
Lenin is on holiday with his family—N. K. Krupskaya, her mother and M. I. Ulyanova in Bonbon (France, department of Seine et Marne). Lenin writes the article “The Faction of Supporters of Otzovism and God-building”. |
| September 5 (18) | Lenin’s articles “The Liquidators Exposed”, “The Election in St. Petersburg” and the note of the editorial board “On the Open Letter of the Executive Committee of the Moscow Regional Committee” are published in the newspaper Proletary No. 47-48. |
| September, prior to 1 (14) | Lenin returns from Bonbon to Paris. |
| September 11 (24) | Lenin’s article “The Faction of Supporters of Otzovism and God-building” is published in the Supplement to No. 47-48 of Proletary. |
| September 14 (27) | Lenin’s article “Once More on Partyism and Non-partyism” is published in No. 9 of the newspaper Novy Dyen. |
| September 19 (October 2) | Lenin reads a paper in Paris on the (September) by-election in St. Petersburg to the Third Duma. |
| October, prior to 5 (18) | In his letter to V. A. Karpinsky Lenin dwells on the transfer of the Party library from Geneva to Paris. |
| October 3 (16) | Lenin’s article “A Word to the Bolsheviks of St. Petersburg” is published in No. 49 of Proletary. |
| October 15 (28) | Lenin reads a paper in Liége to members of Social-Democratic groups “The State of Affairs in the Party”. |
| October 16 (29) | Lenin delivers a public lecture in Liége “The Ideology of the Counter-Revolutionary Bourgeoisie”. |
| October 21-22 (November 3-4) |
Lenin participates in a meeting of the Sotsial-Demokrat editorial board. When the editorial board refuses to publish his article “On Methods of Consolidating Our Party and Its Unity” as a leader, he moves a draft resolution on the strengthening of the Party and its unity. |
| October 21-22 (November 3-4) | Lenin leaves Paris for Brussels to attend the Eleventh Session of the International Socialist Bureau. |
| October 24 (November 6) |
Lenin informs the editorial board of Sotsial-Demokrat that he takes back his statement about resigning from the editorial board. Lenin takes part in the International Conference of Socialist Journalists in Brussels. |
| October 26 (November 7) | Lenin speaks at a meeting of the Eleventh Session of the International Socialist Bureau in Brussels on the split in the Dutch Social-Democratic Labour Party. |
| October 26 (November 8) | Lenin takes part in a meeting of the Inter-parliamentary Commission of the International Socialist Bureau. |
| Later than October 26 (November 8) | Lenin returns to Paris from Brussels. |
| October 31 (November 13) | Lenin’s article “The Tsar Against the Finnish People” is published as a leading article in No. 9 of Sotsial-Demokrat. |
| October | In a letter to a group of pupils of the Capri school Lenin informs them that he had received two letters “about the incipient split in the school” and welcomes the “clear demarcation” between some of the pupils and the Bogdanovites; he gives those who had broken away from the otzovists pertinent advice and instructions. |
| November 1 (14) | Lenin together with I. F. Dubrovinsky and other members of the Central Committee writes a statement to the C.C. Bureau Abroad on the necessity to convene a plenary session of the C.C. of the R.S.D.L.P. in the near future. |
| November 3 (16) | Lenin talks with N. Y. Vilonov who had come to Paris after the split in the Capri school; in connection with this conversation he writes a letter to A. M. Gorky. |
| November 13 (26) | Lenin delivers a public lecture in Paris “The Ideology of the Counter-Revolutionary Liberalism (The Success of Vekhi and Its Social Significance)”. |
| November 21 (December 4) | Lenin makes a report on the Eleventh Session of the International Socialist Bureau at an ordinary meeting of the Second Paris Group for Assistance to the R.S.D.L.P.; he is elected a member of the committee of the group. |
| November 28 (December 11) |
Lenin’s articles: “Some Sources of the Present Ideological Discord”, “Methods of the Liquidators and Party Tasks of the Bolsheviks”, “Golos Sotsial-Demokrata and Cherevanin”, and “The Bourgeois Press Fable About the Expulsion of Gorky”, are published in No. 50 of the newspaper Proletary. Lenin’s article “A Shameful Fiasco” is published as a separate reprint from No. 50 of Proletary. |
| End of November |
Lenin delivers lectures in Paris to five comrades expelled from the Capri school on the subjects: “The Present Moment and Our Tasks” and “Stolypin’s Agrarian Policy”. Lenin writes the article “Ideological Decay and Disunity Among Russian Social-Democrats”. |
| Autumn | Lenin writes “Explanatory Note on the Draft of the Main Grounds of the Bill on the Eight-hour Working Day” for the Social-Democratic group of the Third Duma. |
| December 3 (16) | Lenin writes a letter in reply to I. I. SkvortsovStepanov on the question of the “Prussian” or “American” paths of capitalist agrarian development in Russia. |
| December 13 (26) | Lenin’s article “Concerning Vekhi” is published in No. 15 of Novy Dyen. |
| Second half of December | Lenin delivers lectures “The Present Moment” and “Stolypin’s Agrarian Policy” to a second group of students of the Capri school who had arrived in Paris. |
| December 2 (January 6, 1910) | Lenin’s articles “The Last Word of Russian Liberalism” and “The Eleventh Session of the International Socialist Bureau” are published in No. 10 of Sotsial-Demokrat. |
| End of December (first half of January 1910) |
Lenin writes a note on “The Vperyod Group”. Lenin works in the Sorbonne library (Paris) on the literature relating to questions of philosophy and natural science. |
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