Sir Basil Home Thomson, (21 April 1861 – 26 March 1939) was a British colonial administrator and prison governor, who was head of Metropolitan Police CID during World War I. This gave him a key role in arresting wartime spies, and he was closely involved in the prosecution of Mata Hari, Sir Roger Casement and many Irish and Indian nationalists. His equating of Jews with Bolshevism led to accusations of anti-semitism. Thomson was also a successful novelist.
Early life
Thomson was born in Oxford, where his father, William Thomson (who would later become Archbishop of York), was provost of The Queen's College. Thomson was educated at Worsley's School in Hendon and Eton College, and then attended New College, Oxford, where a fellow undergraduate was Montague John Druitt, the man named as the prime suspect in the Jack the Ripper case by Chief Constable Melville Macnaghten in a Scotland Yard document dated 1894. (Thomson replaced Macnaghten as head of CID at Scotland Yard in 1913.) Thomson ended his university studies after two terms, after suffering bouts of depression, and spent some time from 1881 to 1882 in the United States, working as a farmer in Iowa.
Colonial service
In 1883, with the promise of marriage to a Grace Webber should he be financially secure, Thomson secured a cadet position at the Colonial Office, where he assisted Sir William Des Vœux, then Governor of Fiji. Arriving in Fiji in early 1884, he set about learning the Fijian and Tongan languages while appointed as a stipendiary magistrate throughout the islands. When Sir William MacGregor was appointed administrator of British New Guinea, Thomson joined his staff until he was invalided back to England after contracting malaria. Back in England, Thomson married Grace Webber in 1890, returning to Fiji with his wife in the middle of that year to serve as commissioner of native lands. When Sir John Thurston, the Governor of Fiji, dismissed the Premier of Tonga (Shirley Waldemar Baker) in his capacity as High Commissioner for the Western Pacific, Thomson was moved to Tonga, where he became assistant premier to Siaosi Tukuʻaho, the pro-British chief appointed as Baker's replacement.
