Manuscript notes of Julian Aleksander Bałaszewicz (born 1831 – the earliest date of death 1877) on the theatre repertoire staged in Warsaw in the period prior to the outbreak of the January Uprising and during the Uprising, available in the Scientific Library of the Polish Academy of Arts and Sciences and the Polish Academy of Sciences in Cracow, are published as a source material. In 1861 the author of the manuscript became a spy for the Russian authorities and an instigator operating in the circles of Polish and Russian immigrants in Paris and later London. In the latter he ran an antique shop with historic objects. He passed the acquired information to his superiors in his espionage reports. He recorded the titles of the plays staged in Warsaw in three lists: years 1862, 1863, 1864. In his lists he mentioned premieres and revivals dividing them according to the type of production. In addition, he differentiated between Polish dramas and those translated into Polish from other languages. The information about each staging was supplemented with the number of performances. Most of the plays from the Polish and foreign repertoire were staged very few times due to the boycott of the theatres by Polish audience in the years 1861–1864 and the curfew.

Manuscript notes of Julian Aleksander Bałaszewicz (born 1831 – the earliest date of death 1877) on the theatre repertoire staged in Warsaw in the period prior to the outbreak of the January Uprising and during the Uprising, available in the Scientific Library of the Polish Academy of Arts and Sciences and the Polish Academy of Sciences in Cracow, are published as a source material. In 1861 the author of the manuscript became a spy for the Russian authorities and an instigator operating in the circles of Polish and Russian immigrants in Paris and later London. In the latter he ran an antique shop with historic objects. He passed the acquired information to his superiors in his espionage reports. He recorded the titles of the plays staged in Warsaw in three lists: years 1862, 1863, 1864. In his lists he mentioned premieres and revivals dividing them according to the type of production. In addition, he differentiated between Polish dramas and those translated into Polish from other languages. The information about each staging was supplemented with the number of performances. Most of the plays from the Polish and foreign repertoire were staged very few times due to the boycott of the theatres by Polish audience in the years 1861–1864 and the curfew.