The Rebbe thanks him for the letters, photographs, and recording from the Farbrengen. He advises publishing each booklet at its proper time rather than combining issues. He stresses maintaining ongoing contact with Farbrengen participants, especially after Yud-Tes Kislev, to preserve and expand the inspiration gained.
https://www.torahrecordings.com/rebbe/igroskodesh/016/004/5993