Sosnowiec, Russian-Poland, 1871(Ober Schlesien/Upper Silesia, at that time part of the Russian-Poland area).
Julie Lion, born Drucker
Emil was in close contact with two of his brothers: the oldest, Isidor and the youngest, Heinrich. The parents sent both of them, as well as Emil, to larger cities, when they were still young, where they could visit better schools than were available in the small town of Sosnowitz [PL: Sosnowiec]. After completing german Highschool, Isidor came to Austria, where he studied law. While he was working as Law-Praktikant in Salzburg he came across a recently published broshure "the Jewish State" from Theodor Herzl. This slim book caused such a change in him, that he cut short his stay in Salzburg and moved to Vienna, in order to become a student of Herzl's. He became a champion of this new ideal.
This is but one of the countless examples for the power of Herzl's thoughts, that Isidor Margulies was brought to such an abrupt change in his life, - a man who seemed destined to be a quiet, genuine Humanist and Scholar, but was drawn into the political party fighting. He was a leader in the zionistic dealings of pre-war Vienna, was Head of the Jewish Minority League in Austria after the First World War, and during those years, became totally fluent in Hebrew. After the German Annexation of Austria he emigrated to Palestine, where he still lives now . 
In die Advokatenjiste wurden eingetragen:
Dr. Isidor Margulies mit dem WohnsiUe in Wien (VU* Bezirk), [...]
Entries in the list of lawyers:
Dr. Isidor Margulies, domicile Vienna (VU* District), [...] From Verordnungsblatt des K. K. Justizministeriums , probably for 1902
(because of the digitalisation techique, some of the texts are difficult to understand. )
After the Welt moved to Cologne as a result of Herzl's death in 1904, the Jüdische Zeitung became the leading voicepiece of the jewish zionists. Published for 14 years, it was one of the longest-living viennese zionist newspapers. .
The cultural work for Palestine was conducted by the Jewish Schulverein, of which Dr. Zevi Chajes is the president and Dr. Isidor Margulies, the vice president. By Our Vienna Correspondent. "Our Daily News Letter." Jewish Telegraphic Agency 23 Dec 1924.
JTA Jewish News Archive, 23 Dec 1924