Letter (unsigned) in the handwriting of Rabbi Avraham Yitzchak HaCohen Kook calling to join the Tiferet Bachurim Society in Jerusalem. [C. 1920s-1930s]. The Tiferet Bachurim Society in Jerusalem was founded in 1925 by the Rabbi of Gomel, Rabbi Avraham Elyashiv (1878-1943), who immigrated to Jerusalem together with his father-in-law author of the Leshem. The objective of the society was to gather tradesmen and craftsmen in Jerusalem for Torah studies, discourses and lessons in religious observance. Rabbi Avraham's illustrious father-in-law Rabbi Shlomo Elyashiv, author of the Leshem and his disciple Rabbi Avraham Yitzchak HaCohen Kook, the Chief Rabbi of Eretz Israel, encouraged and supported this enterprise. The relationship between Rabbi Kook and Rabbi Shlomo Elyashiv, author of the Leshem and his son-in-law Rabbi Avraham began in their days in Lithuania at the time Rabbi Kook studied Kabbalah from the Leshem. In 1904, Rabbi Kook [who then served as Av Beit Din of Bauska] ordained Rabbi Avraham with Semichat Chachamim [see Lot 293]. In the 1920s, Rabbi Kook obtained an immigration certificate for the Leshem and his family and when they arrived in Jerusalem, Rabbi Kook came many times to bask in the Leshem's greatness and the Leshem in turn honored Rabbi Kook greatly. From this document, we can learn that Rabbi Kook, too, supported the establishment of Tiferet Bachurim headed by Rabbi Avraham Elyashiv, the Rabbi of Gomel. Leaf, 11X16.5 cm. Approximately 11 handwritten lines. Good condition.