Poor Health and the outbreak of World War I meant that he was unable to complete his studies at the Jagiellonian University.

Since he could not be accepted by the regular army, during the World War, he was active in the secret Wolnej Szkole Wojskowej (English: Free Cadet School) in Warsaw.

[8] He then stayed on in Lithuania, leading delicate negotiations to create a majority in the Sejm in Vilnius, supporting policies of the speaker Józef Piłsudski.

After returning to Warsaw he worked for a short time in the Eastern Department of the Ministry of Foreign Affairs of the Republic of Poland.

From January to May 1954 he stayed in London, where he held the post of Minister of Foreign Affairs in the Polish Government in Exile[13] of Jerzy Hryniewski.

In 1965 he returned to Poland with his wife and settled in Zielonka, (in the road named after his father, the explorer Leopold Janikowski),[14] near Warsaw, where he died a few months later on September 23, 1965.

He was buried on September 27, 1965 - Melchior Wańkowicz gave a funeral oration - in the family grave in Powązki Cemetery in Warsaw.

Their daughter was Hanna Maria, born July 21, 1926, in Warsaw, who married Edward Szczepanik in Rome on June 29, 1946.

["Who's Who"] (Warsaw 1938) (in Polish) publication by the Association of Poles in Italy (Italian: Associazione dei Polacchi in Italia / Polish: Związek Polaków we Włoszech) of a collection of articles covering "Political, public and cultural activity of Poles in Rome in the 20th century" Pro publico bono : Polityczna, społeczna i kulturalna działalność Polaków w Rzymie w XX wieku red.