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Subject
- Aust, George, 1749-1829[remove]2
- Ciphers1
- Cryptography1
- Diplomatic and consular service, British1
- Foreign relations1
- George III, King of Great Britain, 1738-18201
- Great Britain. Foreign Office2
- Grenville, William Wyndham Grenville, Baron, 1759-18341
- History1
- Intelligence service1
- Kings and rulers1
- Officials and employees1
- Thomas Coutts & Co1
- Wickham, William, 1761-18401