<prompt> Bhala okuqhubekayo kwalesi sigaba - UMarchenko, ekuqaleni owayengumuntu ongathathi hlangothi kwezomnotho, waphendukela ekubhaleni nasezombusazwe ngenxa yeziqephu eziningana zokuvalelwa ejele kusukela ngo-1958, lapho aqala khona ukuhlangana nabanye abaphikisi. UMarchenko wathola udumo emhlabeni wonke ngo-1969 ngencwadi yakhe ethi, My Testimony, i-autobiographical account ebhalwe ngemuva kokufika kwakhe eMoscow ngo-1966 mayelana nezijeziso zakhe zakamuva emakamu aseSoviet asebenza kanzima nasejele. Ngemva kokusakazwa okulinganiselwe eSoviet Union ngokuthi samizdat, le ncwadi yabangela intukuthelo eNtshonalanga ngemva kokuba iveze ukuthi isimiso se-gulag saseSoviet saqhubeka ngemva kokufa kukaJoseph Stalin. Ngo-1968, ngaphambi kokuhlasela kweSoviet iCzechoslovakia  <response>: , uMarchenko wabhala incwadi evulekile ebikezela ukuhlasela. Waboshwa futhi, wakhululwa ekuqaleni kwawo-1970, kodwa ngo-1974 waphenywa ngemibuzo futhi waxoshwa ngaphakathi e-Irkutsk Oblast. Ngo-1976, uMarchenko waba ngomunye wabasunguli be-Moscow Helsinki Group, ngaphambi kokuthi aphinde aboshwe futhi avalelwe ejele ngo-1981, lapho aqhubeka khona nokubhala sonke isikhathi sakhe ejele, ekhangisa ngesiphetho seziboshwa zezombusazwe zaseSoviet. Ngemva kokuchitha iminyaka ecishe ibe ngu-20 esejele futhi edingiselwe kwamanye amazwe, uNathan Shcharansky wathi ngaye: Ngemva kokukhululwa kukaYuri Feodorovich Orlov, ngokuqinisekile wayengumboshwa wokuqala waseSoviet ngenxa kanembeza, waba omunye weziboshwa zaphakade zaseSoviet Union. 