Lengthy letter (2 pages) handwritten and signed by R. "Yosef Rosen, Rabbi of Dvinsk", the Rogatchover Gaon. Erev Sukkot, 1920.
Sent to R. Yitzchak Ginsburg, who had sent him a package of food. The Rogatchover thanks him and offers profusive blessings for Sukkot, along with an ingenious pilpul on various topics: the libations of water and wine, the written and oral Torah, sukkah and lulav, repentance and fighting the evil inclination, Eretz Israel, "the city of palms", the aperture of Gehinnom, and other topics.

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. 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 remarkable figure, he was renowned for his tremendous sharpness, and tales of his genius and diligence abound.

[1] leaf. 11.5X18 cm. Closely written on both sides. Good condition. Small marginal open tear.