The Rebbe blesses Rabbi Zevin with strength and redemption, acknowledges receiving a Torah publication, and encourages maximizing Yud-Tes Kislev. He references a halachic discussion in Shu”t Kol Mevaser and suggests a 70th birthday gathering to inspire Torah and Chassidus.
https://www.torahrecordings.com/rebbe/igroskodesh/014/003/4920