[2] As a young man, Harrison was a journalist who worked for newspapers in England, British Columbia, and Japan.
In 1897, while working for Yokohama newspaper called Japan Herald, he began training in Tenjin shinyo-ryu jujutsu.
[citation needed] In 1917, Harrison was commissioned as a second lieutenant in the Labour Corps of the British Army[5] but later transferred to Military Intelligence.
[3][6] In 1921, Harrison left Lithuania to London and started to work as official press attaché and ELTA correspondent in the Lithuanian legation to the United Kingdom.
[7] During the Second World War, Harrison was a censor in Russian, Lithuanian, and Polish languages for the British Post Office.