Conspectus of Feuerbach’s Book Lectures on the Essence of Religion (1909)

Remarks on Books on the Natural Sciences and Philosophy in the Sorbonne Library (1909)

Plan for Lectures on Marxism (January 1909)

Letter to His Sister Anna (19 December, 1908/1 January, 1909

The Fifth (All-Russian) Conference of the R.S.D.L.P. (December 21-27, 1908/January 3-9, 1909)

Letter to His Sister Anna (24 December, 1908/6 January, 1909)

How the Socialist-Revolutionaries Sum Up the Revolution and How the Revolution has Summed Them Up (7/20 January, 1909)

Letter to Camille Huysmans (19 January/1 February, 1909)

On the Road (28 January/10 February, 1909)

Letter to His Sister Anna (6/19 February, 1909)

On the Article “Questions of the Day” (12/25 February, 1909)

Letter to His Sister Anna (16 or 17 February/1 or 2 March, 1909)

Letter to His Sister Anna (17 or 18 February/2 or 3 March, 1909)

Letter to His Sister Anna (23 February/8 March, 1909)

Letter to Camille Huysmans (25 February/10 March, 1909)

Letter to His Sister Anna (2/14 March, 1909)

The Aim of the Proletarian Struggle in Our Revolution (9/22 March and 21 March/3 April, 1909)

Letter to His Sister Anna (9/22 March, 1909)

Letter to His Sister Anna (12/25 March, 1909)

Letter to Camille Huysmans (9/22 March, 1909)

Letter to His Sister Anna (21 and 22 March/3 and 4 April, 1909)

To the Executive Committee of the German Social-Democratic Labour Party (23 March/5 April, 1909)

Letter to His Sister Anna (23 and 24 March/5 and 5 April, 1909)

Letter to His Sister Anna (26 March/8 April, 1909)

Letter to His Sister Anna (April, 1909)

A Caricature of Bolshevism (4/17 April, 1909)

Letter to His Sister Anna (6/19 April, 1909)

The “Leftward Swing” of the Bourgeoisie and the Tasks of the Proletariat (8/21 April, 1909)

Letter to His Sister Anna (8/21 April, 1909)

Letter to The Moscow Committee Of The R.S.D.L.P (prior to 11/24 April, 1909)

Letter to I. F. Dubrovinsky (23 April/6 May, 1909)

Letter to To The Editorial Board Of Proletary (not later than 26 April/9 May, 1909)

Letter to I. F. Dubrovinsky (29 April/12 May, 1909)

Letter to I. F. Dubrovinsky (4/17 May, 1909)

Letter to I. F. Dubrovinsky (6/18 May, 1909)

The Attitude of the Workers' Party to Religion (13/26 May, 1909)

Letter to Rosa Luxemburg (18/31 May, 1909)

Letter to His Mother (21 May/3 June, 1909)

Letter to The Executive Committee Of The International Socialist Bureau (26 May/8 June, 1909)

Letter to His Sister Anna (with N. K. Krupskaya, 26 May/8 June, 1909)

Classes and Parties in Their Attitude to Religion and the Church (4/17 June, 1909)

Conference of the Extended Editorial Board of Proletary (8/21 – 17/30, 1909)

Letter to His Brother (Late June-early July/July, 1909)

The Liquidation of Liquidationism (11/24 July, 1909)

The Tsar Visits Europe and Members of the Black-Hundred Duma Visit England (11/24 July, 1909)

M. Lyadov's Letter to Proletary (11/24 July, 1909)

Letter to His Mother (19 July/1 August, 1909)

Letter to Camille Huysmans (20 July/2 August, 1909)

Letter to Camille Huysmans (29 July/11 August, 1909)

Letter to Camille Huysmans (30 July/12 August, 1909)

Draft Letter of the Bolshevik Centre to the Council of the School on Capri (between 5/18 and 17/30 August, 1909)

A Letter to the Organisers of the Party School on Capri (18/31 August, 1909)

A Letter to Comrades Julius, Vanya, Savely, Ivan, Vladimir, Stanislav and Foma, Students at the Capri Party School (30 August/12 September, 1909)

Letter to A. I. Lyubimov (18/31 August, 1909)

Letter to G. Y. Zinoviev (24 August/6 September, 1909)

Letter to His Mother (24 August/6 September, 1909)

Letter to Camille Huysmans (26 August/8 September, 1909)

Letter to L. B. Kamenev (27 August/9 September, 1909)

Letter to G. Y. Zinoviev (27 August/9 September, 1909)

Letter To G. Y. Zinoviev (August, 1909)

Letter to A. I. Lyubimov (Beginning/End of September, 1909)

The Liquidators Exposed (5/18 September, 1909)

On the Open Letter of the Executive Committee of the Moscow Regional Committee (5/18 September, 1909)

The Election in St. Petersburg (A Comment, 5/18 September, 1909)

Letter To G. Y. Zinoviev (7/20 or 14/27 September, 1909)

The Faction of Supporters of Otzovism and God-Building (11/24 September, 1909)

Letter to Camille Huysmans (11/24 September, 1909)

Once More on Partyism and Non-Partyism (14/27 September, 1909)

Letter to A. I. Lyubimov (First/Second half of September, 1909)

Letter to The Central Committee Of The R.S.D.L.P(17/30 September, 1909)

Letter to Camille Huysmans (17/30 September, 1909)

Letter to M. P. Tomsky (prior to 20 September/3 October, 1909)

Letter to Camille Huysmans (30 September/13 October, 1909)

Letter to A. I. Lyubimov (not earlier than 2/15 October, 1909)

Draft Reply To A Letter From The Council Of The Capri School (not earlier than 2/15 October, 1909)

Letter to V. A. Karpinsky (First/Second half of October, 1909)

Letter to The Economic Commission Of The Bolshevik Centre (Not earlier than October, 1909)

A Word to the Bolsheviks of St. Petersburg (3/14 October, 1909)

Note to the Article “The St. Petersburg Election” (3/14 October, 1909)

Draft Resolution on the Consolidation of the Party and of Its Unity (21 October/5 November, 1909)

Speech at the Meeting of the International Socialist Bureau on the Split in the Dutch Social-Democratic Labour Party (From the Report in the “Bulletin” of the I.S.B. (25 October/7 November, 1909)

Letter to His Mother (25 October/7 November, 1909)

The Tsar Against the Finnish People (31 October/13 November, 1909)

To Pupils of the Capri School (October, 1909)

Letter to His Sister Maria (3/16 or 4/17 December, 1909)

Letter to The Secretary Of The Editorial Board Of The Central Organ (4/17 November, 1909)

Letter to His Mother (4/17 November, 1909)

Letter to The Central Committee Of The R.S.D.L.P (14/27 November, 1909)

Letter to Maxim Gorky (16/29 November, 1909)

Letter to Maxim Gorky (Not Earlier Than 20 November/3 December, 1909)

A Shameful Fiasco (28 November/11 December, 1909)

Some Sources of the Present Ideological Discord (28 November/11 December, 1909)

Methods of the Liquidators and Party Tasks of the Bolsheviks (28 November/11 December, 1909)

Golos Sotsial-Demokrata and Cherevanin (28 November/11 December, 1909)

The Bourgeois Press Fable About the Expulsion of Gorky (28 November/11 December, 1909)

Ideological Decay and Disunity Among Russian Social-Democrats (end of November/beginning of December, 1909)

Explanatory Note on the Draft of the Main Grounds of the Bill on the Eight-Hour Working Day (Autumn 1909)

Letter to I. I. Skvortsov-Stepanov (2/15 December, 1909)

Letter to His Mother (7/20 or 8/21 December, 1909)

Request To Statisticians Of Zemstvo, City And Government Institutions (9/22 December, 1909)

Letter to His Sister Maria (10/23or 11/24 December, 1909)

Concerning Vekhi (13/26 December, 1909)

Letter to I. I. Skvortsov-Stepanov (16/29 December, 1909)