A collection of memoirs and other documentary materials dedicated to the twenty-fifth anniversary of the first congress of the RSDLP . Contains diverse and little-known to the modern reader information about the situation of workers and the development of the social democratic movement at the end of the XIX century. Numbering of printed original pages saved. The page number in square brackets is placed at the end of the page. Photos are not included in the order of page numbering, as well as in the printed original. Location of portraits changed. They are placed either in the memories of this person or in the place where they are mentioned .. In the printed original, the photos are inserted in separate pages (4 pcs. on the page). Numbering of footnotes from page to page replaced by solid. The wording of the footnotes has also been changed. In the printed original, they were designated as follows: 1). In the e-book, the footnote number is placed in square brackets. The original spelling is preserved. The discharge is replaced by a fat release. In some cases (usually when writing individual words) the discharge is saved. Changed mark of quotation marks. In the text there are numerous deviations from the rules of spelling, which can be identified as errors. In some cases, their preservation is specified in the comments. CSS. was used for the layout of tables Cr3. is recommended for reading. Tables are presented in two forms: as a table and as a drawing for programs that do not support CSS. In some cases, for ease of reading tables, the album orientation of the book is recommended. — V_E.