Lubavitch lit.

According to the Federation of Jewish Communities of the CIS, more than 40 letters from the personal archive of the 7th Lubavitcher Rebbe's father, Rabbi Levi Yitzchok Schneerson, have been recovered in the FSU.
According to the tantalizing report, "Among the newly discovered items are letters written by the fifth Lubavitcher Rebbe to Rabbi Levi Yitzchok Schneerson. These letters also include correspondence from his son, the seventh Lubavitcher Rebbe, Rabbi Menachem Mendel Shneerson, of righteous memory, and his wife Rebbetzin Chaya Mushka... A great part of these documents relates to that period when Rabbi Levi Yitzchok's son, Rabbi Menachem Schneerson, lived in Paris and his parents suffered from repression by the Soviet authorities. The correspondence reflects the tragedies of that time, and the efforts made to preserve Jewish life. Some of the letters authored by Levi Yitzchok Schneerson himself, as well as other important documents in this lot, tell about Jewish life in Ukraine prior to World War Two."
Nu? Some excerpts or details, please.