Nechemia Halevi Ginzburg of Dubrovna. Divrei Nechemiah [responsa, with Drushim based upon Chassidic concepts]. Volumes I and II.

Married to the daughter of R. Chaim Abraham Schneerson, brother of the Mitteler Rebbe, the author was one of the prime disciples of the Baal HaTanya R. Shneur Zalman (his wife’s grandfather). These volumes are important for the scholarly exchange of correspondence between the Tzemach Tzedek and the author. The Tzemach Tzedek regarded the author as one of the foremost poskim of his generation and deferred to him many difficult questions of Jewish law. In his correspondence, the Tzemach Tzedek refers to him as “chathan dodi” the son-in-law of my uncle (see f. 31b of volume on Even Ha’Ezer). The work also contains supplements and omissions of parts of the Shulchan Aruch HaRav (see ff. 73-8 of volume on Orach Chaim). These supplements were later included in subsequent editions of the Shulchan Aruch. See Mondschein, Sifrei Hahalacha shel Admor HaZaken, p. 26.