Abraham Lewysohn was a Hebraist

Hebraist

A Hebraist is a specialist in Hebrew and Hebraic studies. Specifically, British and German scholars of the 18th and 19th centuries who were involved in the study of Hebrew language and literature were commonly known by this designation, at a time when Hebrew was little understood outside practicing...

 and rabbi

Rabbi

In Judaism, a rabbi is a teacher of Torah. This title derives from the Hebrew word רבי , meaning "My Master" , which is the way a student would address a master of Torah...

 of Peiskretscham, Upper Silesia

Upper Silesia

Upper Silesia is the southeastern part of the historical and geographical region of Silesia. Since the 9th century, Upper Silesia has been part of Greater Moravia, the Duchy of Bohemia, the Piast Kingdom of Poland, again of the Lands of the Bohemian Crown and the Holy Roman Empire, as well as of...

. He left a large number of manuscripts, several hundred sermons in Hebrew and Danish, novellæ on the Talmud

Talmud

The Talmud is a central text of mainstream Judaism. It takes the form of a record of rabbinic discussions pertaining to Jewish law, ethics, philosophy, customs and history....

, verses, a German work on Hebrew grammar

Hebrew grammar

-History of studies in Hebrew grammar:The Masoretes in the 7th to 11th centuries laid the foundation for grammatical analysis of Hebrew. As early as the 9th century Judah ibn Kuraish discussed the relationship between Arabic and Hebrew...

, and a work entitled Dorot Tannaim wa-Amoraim, a history of the Tannaim

Tannaim

The Tannaim were the Rabbinic sages whose views are recorded in the Mishnah, from approximately 70-200 CE. The period of the Tannaim, also referred to as the Mishnaic period, lasted about 130 years...

 and Amoraim, the introduction to which, entitled "Parnasat chakme ha-Talmud," was published in Kobak's Jeschurun (i, part 3, p. 81).

Publications

• Me'ore Minhagim (Berlin, 1846), a critical essay on religious customs according to the Talmud, Posekim, and Midrashim (this work was afterward plagiarized by Finkelstein, Vienna, 1851);
• Shete Derashot (Gleiwitz, 1856), sermons;
• Toledot R. Yehoshua' ben Ḥananyah, biography of R. Joshua b. Hananiah (in Keller's Bikkurim, 1865);
• Toledot Rab, biography of Rab or Abba Arika
  Abba Arika
  Abba Arika was a Jewish Talmudist who lived in Babylonia, known as an amora of the 3rd century who established at Sura the systematic study of the rabbinic traditions, which, using the Mishnah as text, led to the compilation of the Talmud...
  
  (Kobak's Jeschurun, vi and vii). Lewysohn was also a regular contributor to Ha-Maggid and to Klein's Jahrbuch.