Letter on postcard, handwritten and signed by the Rogatchover Gaon, R. Yosef Rosen, Rabbi of Dvinsk. [Russia], 11th Adar II 1921.
Addressed to R. Yitzchak Ginsburg. He begins with thanks for the food packages he had sent, and a blessing "to rejoice on Purim with a happy heart". His blessing is interspersed with Torah thoughts, continuing with an ingenious pilpul characteristically weaving together different topics: the joy of Torah and pilpul, attending to Torah scholars, the Sanhedrin, Mordechai and Esther, as well as other topics.
The present letter was printed with notes and explanations in Responsa Tzafnat Paneach HaChadashot (Modiin Illit, 2012, Part II, letters section, letter 12, pp. 446-448).

R. Yosef Rosen (1858-1936), Rabbi of Dvinsk, author of Tzafnat Paneach, known as the Rogatchover (after his birth town Rogatchov-Rahachow), a Chabad-Kopust follower. His father took him as a child to the Tzemach Tzedek, who blessed him with exceptional scholarliness and instructed him to study Tractate Nazir (some say this was the reason the Rogatchover did not cut his hair). In his youth, he studied under R. Yosef Dov Ber Soloveitchik, the Beit HaLevi, alongside the latter's son R. Chaim of Brisk.
From 1889, he served as Rabbi of the Chabad Chassidic community in Dvinsk (Daugavpils, Latvia), alongside the city's Rabbi, the Or Sameach, a position he held for 40 years. A remarkable figure, he was renowned for his tremendous sharpness and genius, his comprehensive knowledge of all areas of the Torah, down to its finest details, and for producing profound definitions, hypotheses and original methods of Torah study. Tales of his genius and diligence abound.

[1] postcard. 21 cm. Closely written on both sides. Good condition. Stains and wear.

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