Sectarian animosity between Catholics and Protestants, and dynastic rivalries between adherents of the Tudors, the Stuarts and the Hanoverians, involved foreign conspirators, aggrieved exiles, domestic malcontents and headstrong adventurers. European power-centres were monitored from London. The Lord Protector, Oliver Cromwell, used countless paid spies during the 1650s and was said to have ‘carried the secrets of all the Princes of Europe at his girdle’. The Venetian Ambassador in London, reporting on the Protectorate, declared that ‘no Government on earth discloses its own acts less and knows those of others more precisely than that of England’.2
During the 1720s the South Sea Company financial scandal set other precedents in the spiriting away from prosecutors of malefactors with disturbing secret knowledge. The company’s cashier, Robert Knight, after attempting to blackmail government ministers into protecting him, and reluctant to undergo close interrogation, took ship for Calais with his son and namesake. The two Robert Knights then hastened to the Austrian Netherlands, where a junior English diplomat acted on his own initiative, pursued the elder Knight with a troop of hussars and had him incarcerated, under heavy security, in the citadel of Antwerp. Although the House of Commons sought Knight’s extradition, their purpose was not punishment but political gamesmanship: the opposition wished him to divulge material incriminating office-holders. The monarch and the government were correspondingly anxious to prevent his repatriation and to silence the disruptive stories that he might tell. There followed an intricate ‘screen’: the Georgian word for a cover-up. After negotiations between London and Vienna, Knight was transferred to Luxembourg, and then taken at night to the Ardennes and set free. The authorities meanwhile arranged for a hole to be dug in the wall of the Knights’ cell, and for a rope-ladder to be lowered from it, in order to bolster the pretence that they had escaped. The determination of London office-holders that the secrets of Knight’s financial chicanery should not be publicly aired was akin to the aversion of twentieth-century authorities to sharing security failures.3
Eighteenth-century uprisings by Scottish Jacobites against the government in London were defeated by secret intelligence, disinformation and betrayals as well as by force of arms. Both sides employed messenger-spies, such as the Jacobite innkeeper who in 1745 tried to cut his throat after being captured with papers from Charles Edward, the Young Pretender, hidden in his glove. The London government gained an important advantage when the Jacobite cipher code was seized by a mob in Cumberland from the Duke of Perth’s travelling servant. After two years of imprisonment in the Tower of London, the clan chief Alastair Ruadh MacDonell of Glengarry was turned, and under the alias of Pickle acted as a secret informant on Jacobite activities after 1747. ‘Tall, athletic, with a frank and pleasing face, Pickle could never be taken for a traitor,’ wrote his biographer. ‘The man was brave, for he moved freely in France, England, and Scotland, well knowing that the sgian [small dagger] was sharpened for his throat if he were detected.’ He was not a paid informer, but a conceited man who enjoyed the secret importance of double-dealing. His second alias was Random, which suggests his liking for risk. Collectors of antiquities and works of art, who roamed Europe in pursuit of their avocation, as well as the dealers from whom they bought their rarities, had good cover for underhand activities as political agents. There were ample opportunities for gossip, covert surveillance, gambits and counter-espionage by connoisseurs who encountered Jacobites in exile. Much useless tittle-tattle from Rome or Florence about the Old and Young Pretenders was sold to London at high prices, which were paid tardily or not at all.4
The Home Office employed informers and agents provocateurs during the French revolutionary wars and their turbulent sequel. Lord Sidmouth, Home Secretary during 1812–22, became convinced by his sources, so he told the House of Lords in 1817, that ‘scarcely a cottage had escaped the perseverance of the agents of mischief’. Radicals, warned Sidmouth, ‘had parliamentary reform in their mouths, but rebellion and revolution in their hearts’. The Cato Street conspirator Arthur Thistlewood was incriminated by a bevy of police spies, including John Castle, a maker of paper dolls for children, who was also a bigamist and pimp, and George Edwards, a maker of plaster figurines, whose bestselling line was a bust of the headmaster of Eton which pupils bought to use in the manner of a coconut shy. The defence of the realm from internal foes has always needed its Pickles, Randoms and Castles.5
Mid-nineteenth-century London became a haven for political exiles (predominantly German, but some Italian). Most were quiescent refugees who sat smoking, talking, eating and drinking in Soho dives, but one account of 1859 presents a minority group of active conspirators gathering in a small Whitechapel Gasthaus known as the Tyrants’ Entrails: ‘the incandescent ones, the roaring, raging, rampaging, red-hot refugees; the amateurs in vitriol, soda-bottles full of gunpowder, and broken bottles for horses’ hoofs’. The surveillance of these irreconcilables was the preserve of foreign police spies. A Prussian spy reported in 1853 on one exile who had been born in the Rhineland, had been radicalized in Berlin and was living in two rooms in Dean Street, Soho: ‘everything is broken down, tattered and torn, with a half inch of dust over everything … manuscripts, books and newspapers, as well as children’s toys, and rags and tatters of his wife’s sewing basket, several cups with broken rims, knives, forks, lamps, an inkpot, tumblers, Dutch clay pipes, tobacco ash – in a word, everything top-turvy’. As to the paterfamilias, ‘Washing, grooming and changing his linen are things he rarely does, and he likes to get drunk. Though he is often idle for days on end, he will work day and night with tireless endurance when he has great work to do. He has no fixed times for going to sleep and waking up. He often stays up all night, and then lies down fully clothed on the sofa at midday and sleeps till evening, untroubled by the comings and goings of the world.’ It was in this squalid chaos that Karl Marx did the preliminary thinking that led to Das Kapital.6
Every successful military leader valued intelligence reports. ‘I am always preceded by a hundred spies,’ the all-conquering Frederick the Great of Prussia said in the 1750s. His decision to go to war in 1756 was based partly on the intelligence received from his spy in the Austrian embassy in Berlin, and from the interception and decoding of messages sent by the Dutch envoy in St Petersburg to The Hague. Half a century later Napoleon declared, ‘one spy in the right place is worth 20,000 men in the field’. International diplomacy also suborned well-placed informants among the desk-bound officials of other great powers. As one example, Lord Cowley, Ambassador in Vienna during the 1820s, had the private secretary of the Austrian Foreign Minister Metternich in his pay.7
An intelligence department to measure, limit and manage the risks entailed by the territorial rivalry in Asia between England and Russia was developed in London from the 1850s. This department worked with successive prime ministers and the Foreign Office to inform and strengthen imperial policy-making. William Beaver, in his pioneering study of Victorian military intelligence, argues that the Pax Britannica was intelligence-based and intelligence-led. The London government’s success during Victoria’s reign in protecting its ideals of progress, prosperity and peace was achievable only by investigating, watching and listening to hostile powers, and by collating, interpreting and acting on intelligence about potential foes. The efforts of this War Office sub-division meant that for over half a century the British Empire waged colonial wars in Asia and made localized interventions in Africa, but avoided major warfare in either Europe or Asia. ‘Britain’, says Beaver, ‘played her cards well because she sat facing the mirror.’8
This systematic intelligence-gathering was instigated by Thomas Jervis, a retired Indian Army officer of whom it was said that cartography was second only to Christianity as the ruling passion of his life. Shortly before the outbreak of the Crimean war, he bought copies of the Russian army’s secret map of the Crimea and of the Austrian staff map of Turkey-in-Europe from a source in Brussels. At his own expense he then provided the War Office with tactical maps of the seat of war. These proved