[ex libris S. Marczak-Oborski] Brzechwa Jan, Wormwood and Cloud [1st edition] [Mortkowicz].

Brzechwa Jan, Piołun i obłok, Warsaw 1935, Jakub Mortkowicz publishing house, first edition, p. 64, dimensions 13 x 19 cm. Autograph and exlibris by Stanislaw Marczak-Oborski. Publisher's booklet cover.

Stanislaw Marczak-Oborski a.k.a. "Journalist" (born December 26, 1921 in Dzików, died August 11, 1987 in Warsaw) - Polish poet, theater scholar, journalist, literary critic and translator, researcher of the drama and theater of the Bicentennial and postwar theater life in Poland; documentary filmmaker.

Jan Brzechwa, actually Jan Wiktor Lesman, alias Szer-Szeń, Inspicjent Brzeszczot (born August 15, 1898 in Żmerynka, died July 2, 1966 in Warsaw) - Polish lawyer and poet of Jewish origin, author of fairy tales and poems for children, satirical texts for adults, and translator of Russian literature.

Jakub Mortkowicz (born March 25, 1876 in Opoczno, died August 9, 1931 in Warsaw) - Polish bookseller and book publisher.