The Rebbe acknowledges receipt of letters and apologizes for the delayed response due to his workload. He appreciates the recipient’s efforts in influencing a minyan of individuals and will mention them at the Ohel on Yud-Tes Kislev. He encourages continued dedication to spreading Chassidus and extends blessings for success and nachas.
https://www.torahrecordings.com/rebbe/004_igros_kodesh/kislev/823