Yaakov Yitzchak Eizik Perkovitz was an individual who corresponded with the Lubavitcher Rebbe, Rabbi Menachem Mendel Schneerson, sharing stories and historical accounts related to Chassidic leaders and Jewish scholarship.
In a letter dated 3 Adar, 5715 (1955), the Rebbe thanks Perkovitz for sending a story about the Rebbe Maharash, as found in the book Chevel Binyamin (part two). The Rebbe expresses appreciation for the effort to preserve and share such narratives but also points out the importance of historical accuracy. Specifically, the Rebbe corrects a detail, noting that the Rebbe Maharash's daughter-in-law was a granddaughter of the Chatam Sofer, not of the Malbim. This exchange highlights the Rebbe's encouragement of research and dissemination of Chassidic history, coupled with a strong emphasis on precision and factual correctness.