Information about arrest of Isak Falk, suspected of espionage

Information about arrest in Budapest of Isak Falk, suspected of espionage, using American passport issued for a name Jakub Adler. The arrested claimed that he changed his name in the US.
The National Archives in Krakow
Fonds: C.K. Dyrekcja Policji w Krakowie 1849-1919
Signature: DPKr 101
Page/Card Number: L.352/pr/15
Language: Polish
Creation Date: 1915
Place of origin: Kraków
Geographical names: America, Budapest, USA
Organizations and institution: Imperial and Royal Directorate of Police in Krakow
Surnames: Falk Isak
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