Having passed his secondary-school graduation exam, the young patriot Jaroslav Cisař left Brno to study mathematics and astronomy in New York. He reacted to the fire of war in 1914 by his active engagement in anti-Austrian resistance, whose aim was the restoration of the independence of the Czech nation. After the arrival of T. G. Masaryk in the United States, he became his personal secretary in the spring of 1918. Following the establishment of the Czechoslovak Republic, he worked at the Czechoslovak embassy in London, from 1927 in the newspaper Lidove noviny in Brno. After the occupation, he left for emigration, where he was involved in the tasks of the Ministry of Foreign Affairs. After the change in the political situation in 1948, he was released from the Ministry of Foreign Affairs and was fortunate enough to be employed as an astronomer at the University of St Andrews in Scotland. From the 1970s, he struggled with normalisation authorities over his return to the homeland. That was successfully accomplished in 1980.