Long letter, around 20 lines, written and signed by the Tzaddik of Warsaw, to the Rabbi of Jerusalem, Rabbi Yosef Haim Zonenfeld. On the issue of prayer for a sick boy, and more. Holy punches, generally very good condition. Rav Zilberberg was also known as Rav Naftali Virshover, lived 1850-1930, was a Motz in Warsaw, known as the publisher of books of the Mahral Tzintz. Born in Poland, son of Rav Avraham Binyamin Beinish Zilberberg, rabbi and Av Beit Din of Kotna and Virshov. Was a student of Rabbi Yisrael Salanter and Rabbi Yosef Dov Soloveitchik of Brisk. Was close to the Natziv of Volozhin and the Chafetz Haim, and traveled to Rabbi Avraham Burnstein of Sochatchov and the Admor Sfat Emet of Gur. Over the many years he served as Motz in Warsaw.