This letter sheds light on his style of learning. The letter was written in 1854 when R. Rephael was all of 17 and his brother in law 22. The novellae revolves around tractates Chulin and Shavuot. On the margins of the letter, Rabbi Chaim Berlin wrote beautifully his responsa on Rabbi Rafael's novellae, showing their proficiency in Talmud with Tosafos.
A long letter (25:19 cm.) written on both sides of the page in Rabbi Raphael's handsome and impressive handwriting, few paper repairs in folds.
Rabbi Raphael was the son in law of the Netziv and served as Rosh Yeshiva of Volozhin until his demise in 1921.