mail, post office, Black Chamber of the British Ministry for Foreign Affairs, Abchurch Lane, London, wood engraving, 1844, black cabinet, Cabinet Noir, mail censorship, censorship of letters, espionage, intelligence service, intelligence, Central Intelligence Agency, Security Service, MI-5, Defense Intelligence Agency, dissolve 1844, people, clerk, clerks, employees, officer, public employee, labour, labor, working, work, profession, professions, Great Britain, United Kingdom, Victorian era, 19th century, mail, post, post office, post offices, chamber,, Artist's Copyright has not to be cleared

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Artist's Copyright has not to be cleared

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Keywords: 1844, 19th, affairs, agency, black, britain, british, cabinet, censorship, central, century, chamber, chambers, clerk, clerks, defense, dissolve, employee, employees, era, espionage, foreign, great, historic, historical, intelligence, kingdom, labor, labour, letters, mail, mi-5, ministry, noir, office, officer, offices, people, post, profession, professions, public, security, service, united, victorian, work, working