The for the most part unexplored scholarly materials compiled by the renowned scholar of Semitic studies Mark Lidzbarski during his life (1868 – 1928) are part of the valuable collections of the library of the Deutsche Morgenländische Gesellschaft. Ludmila Hanisch engaged herself intensively in these materials and presents unpublished sources concerning Lidzbarski. Hanisch’s (1947 – 2015) work focused on Islamic studies and the history of scholarship. She contributed immensely to the understanding of the German oriental studies of the late 19th and early 20th century. The present paper is a posthumously published overview of Lidzbarski’s estate by Ludmila Hanisch.