[1] p., 138:210 mm., creased on folds, ink on stationary, signed and dated.

Letter by R. Reuben b. Moses Margulies (1889-1971), with several notes in margins. R. Margolies was born in 1889 in Lemberg (now Lviv), then part of the Austrian-Hungarian Empire and now in Ukraine and from 1918 to 1940 in Poland. He emigrated to Mandate Palestine in 1934, settling in Tel-Aviv. R. Margolies authored over 55 books on Jewish topics. He possessed a photographic memory, and was well versed in all aspects of both the written Bible, Oral Torah (Talmud and its commentaries) and Kabbalah (Zohar etc.). He established the Rambam library.

He wrote on a wide range of subjects; His works were meant for both scholars and laymen alike. All of his writings are in Hebrew. He wrote on the formation of the Mishna and the Talmud displaying originality in thought, and a wide range of knowledge. He further wrote on the Kabbalah. Such works include "The Rambam and the Zohar" demonstrating correlations between Maimonides Mishna Torah and the Zohar; Nitzotzei Zohar demonstrating correlations between the Tannatic and Amoraic works (such as the Talmud and Medrashim) and the Zohar. He was also involved in a controversy with Gershon Scholem over the Rabbi Jacob Emden/Rabbi Jonathan Eybeshuetz controversy. Margulies produced a pamphlet defending R. Eybeshuetz and in response Scholem produced his own disagreeing with Marguleis's conclusions.

He wrote a number of scholarly biographies of major Jewish personalities such as Maharsha, Ohr Ha-Chaim Hakodosh, Noam Elimelech, Rabbi Moses ben Nachman (Ramban), and R' Yechiel of Paris including valuable annotation clarifying ideas in their works. The biographies focus primarily on their methods of scholarship and not on their personalities. First printed in Poland, they were never reprinted. He wrote several works concerning the development of a legal system in the newly formed Jewish State (Kavei Ohr, Tal Tichye).