All of Pasternak 's letters to her and other manuscripts and documents had been seized by the KGB during her last arrest .
Ivinskaya was rehabilitated only under Gorbachev in 1988 .
All of Pasternak 's letters to Ivinskaya and other manuscripts and documents had been seized by the KGB during Ivinskaya 's last arrest .
Ivinskaya was rehabilitated only under Gorbachev in 1988 .