From what I can gather 'Stolypinki' were specially adapted railway carriages designed for the mass transportation of prisoners. Looking from the outside like ordinary carriages they contained internal cages where prisoners could be held in groups under guard. Originally used in the Tsarist period they continued in use throughout the Stalinist period and some were used to take Polish prisoners to Katyn.
Problem is, though I know of descriptions of them I'm unable to trace any photographs or even drawings. Does anyonme know where any might be found?
Phil Tomaselli