Hackelman then fled to Belgium, where he assumed a new name, Arkadiy Harting. Rachkovsky assigned Harting to a number of missions concerned with security of visiting Russian dignitaries. For these assignments, he was decorated by Honours from Russia and a number of host countries. In 1892–1893 he was baptised and assumed the name Arkadiy Mikhailovich. In 1896 he officially changed his surname to Harding (Гартинг). He then married a Belgian Magdalena Pirlot. In 1900, he was appointed head of Okhrana Berlin station, which initially operated as a branch of the Paris Okhrana under Rachkovsky, but more independently after 1902, when Rachkovsky was replaced by a new chief, Leonid Rataev. In Berlin Harting organised a surveillance and penetration network similar to that operated by Rachkovsky in Paris. One of his agents was Jacob Zhitomirsky, who provided valuable information on the activities of the Russian Social Democratic Labour Party and its Bolshevik faction, including the inner circle of Russia's future communist leader, Vladimir Lenin. Zhitormirsky's information led to the arrest of Kamo by the German Police for his role in the 1907 Tiflis bank robbery. In 1904, during Russo-Japanese War, Harting was sent on an assignment not directly related to revolutionary activities. He was to organise a surveillance of possible Japanese spies in the Baltic, in order to prevent disruptions to the navigation of Russian fleet to the Pacific.