The following article (DARIUS STALIŪNAS (2004) Anti-Jewish disturbances in the North-Western provinces in the early 1880s, East European Jewish Affairs, 34:2, 119-138, DOI: 10.1080/1350167052000340913  ) elaborates among others on the events in Prienai, citing a Russian dossier as a source.But the article give no names. The author, Dr. Darius Staliunas, is a researcher at the Institute of History of the Lithuanian Academy of Sciences.   

Ruth Leiserowitz
Berlin / Warsaw