Postcard handwritten and signed by S.Y. Agnon (signed "S.Y. Czaczkes"), addressed to his brother-in-law Moshe (Moses) Marx in Berlin. Wiesbaden, [July 1921]. Hebrew. Postcard sent by S.Y. Agnon to his brother in law in Berlin, Moshe (Moses) Marx. Agnon informs him about his intention to travel to Königsberg to visit his wife Esther and their daughter Emunah, who was born not long before: "Lord willing, tomorrow Monday July 17 or on Tuesday July 18, I will be going to Königsberg to see my daughter, whom my wife Esther gave birth to". He adds: "I will be delighted if his honor gives me a place to sleep in his home for one night". Following his signature, "Y.S. Czaczkes", Agnon writes: "If you may, please ask Mr. Stybel in Berlin?" [referring to Avraham Yosef Stybel (1885-1946), wealthy merchant; founder of the Stybel publishing house]. In his book "Chaye Agnon" [The Life of Agnon], Dan Laor writes about the birth of Agnon's eldest daughter, Emunah, and about this postcard (Hebrew; p. 145): "In late June, when her due date was nearing, Esther left Wiesbaden and as was customary those days, went to give birth close to her family. After a day-and-a-half-long train ride she arrived in Königsberg […] on July 2, Agnon was informed that his wife gave birth to a daughter. The news made him very happy, yet two weeks passed since the birth until the day he decided to leave Wiesbaden for Königsberg. On July 16, Agnon sent a postcard to his brother-in-law Moshe Marx informing him that he intended to have a layover in Berlin on his way to Königsberg […] on this occasion, he asked him to arrange a meeting with the publisher Stybel. Agnon remained in Königsberg until the end of July […]". Moshe (Moses) Marx (1885-1973), bibliographer, merchant and well-known book-collector, contributed to Hebrew literature by studying incunabula and 16th century publishing; co-founder of the Soncino Society (Soncino Gesellschaft; The Soncino Society of Friends of the Jewish Book). His sister, Esther (Esterlein) was Agnon's wife. 9X14 cm. Good condition.