The Rebbe acknowledges receipt of letters and booklets, encouraging further efforts in spreading Chassidus. He requests additional old Chassidic manuscripts, hoping to publish them for the benefit of many. The Rebbe also shares that a Chassidic discourse, Pelach HaRimon, was approved for publication by the Previous Rebbe, despite initial opposition.
https://www.torahrecordings.com/rebbe/004_igros_kodesh/teves/860