The following is derived from: https://www.kotzkblog.com/2016/11/100the-secret-manuscript-from-r-nachman.html
(Tzirel, daughter of R’ Lipvetzker, Tzirel, accosted and rebuked him (R. Chazan) for not transmitting the code and interpretation of the secret scroll to the next generation while he was on his deathbed. But R. Chazan had already lost his faculty of speech and, while the coded scroll survived, he died taking the secrets of its interpretation to his grave.
…
1963 the scroll was smuggled out of the Iron Curtain by R’ Gedalia Fleer [R. Gedaliah Fleer was originally from Brooklyn, and was the first ‘westerner’ to visit Uman, the burial place of Rabbi Nachman in the Ukraine, after the Second World War. He also was one of the early writers to introduce Breslover teachings to the English speaking world. (I obtained a copy of one of his books about thirty years ago and it left a profound impression upon me at the time.)].
Back in Jerusalem R. Fleer showed the manuscript to R. Lippel (a student of R. Avraham Sternhartz, another major exponent of Breslov, who had escaped from the Soviet Union in 1940). R. Lippel claimed R. Sternhatz taught him how to break the code of the script while the two of them were still in the Ukraine.
At first R. Lippel refused to divulge the code to R. Fleer but eventually did, on the condition it remain a secret. R. Fleer made copies of the text which he distributed to some members of the Breslover community in Israel but withheld the ‘code’ and interpretation as to its meaning.
