Peter Calvocoressi was born in Karachi, British India in 1912 before moving to England where he grew up, attending Eton and then Oxford University. During World War II, he worked as an intelligence analyst at Bletchley Park. After the war, Calvocoressi’s impressive career saw him working as a lawyer, a politician, a publisher, an academic, a journalist, an author and an historian. He died in Dorset in 2010 at the age of 97.Peter Calvocoressi was born in Karachi, British India in 1912 before moving to England where he grew up, attending Eton and then Oxford University. During World War II, he worked as an intelligence analyst at Bletchley Park. After the war, Calvocoressi’s impressive career saw him working as a lawyer, a politician, a publisher, an academic, a journalist, an author and an historian. He died in Dorset in 2010 at the age of 97. Joel Greenberg is a Canadian author and historian living in the UK who researches and writes about signals intelligence and its impact on two world wars. He is has written the authorised biographies of two key figures in the story of signals intelligence, Gordon Welchman and Alastair Denniston. The Welchman book, Gordon Welchman, Bletchley Park’s Architect of Ultra Intelligence, is the basis of a joint BBC/Smithsonian Network 2015 documentary about Welchman –The Forgotten Genius of Bletchley Park.. The Denniston book, Alastair Denniston, Code-breaking from Room 40 to Berkeley Street and the Birth of GCHQ, is both a biography and an account of signals intelligence from its early development to the birth of GCHQ. Denniston was the first Head of GCHQ and the book was launched at its headquarters on 7 September 2017 in honour of him.

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Peter Calvocoressi was born in Karachi, British India in 1912 before moving to England where he grew up, attending Eton and then Oxford University. During World War II, he worked as an intelligence analyst at Bletchley Park. After the war, Calvocoressi’s impressive career saw him working as a lawyer, a politician, a publisher, an academic, a journalist, an author and an historian. He died in Dorset in 2010 at the age of 97.Peter Calvocoressi was born in Karachi, British India in 1912 before moving to England where he grew up, attending Eton and then Oxford University. During World War II, he worked as an intelligence analyst at Bletchley Park. After the war, Calvocoressi’s impressive career saw him working as a lawyer, a politician, a publisher, an academic, a journalist, an author and an historian. He died in Dorset in 2010 at the age of 97. Joel Greenberg is a Canadian author and historian living in the UK who researches and writes about signals intelligence and its impact on two world wars. He is has written the authorised biographies of two key figures in the story of signals intelligence, Gordon Welchman and Alastair Denniston. The Welchman book, Gordon Welchman, Bletchley Park’s Architect of Ultra Intelligence, is the basis of a joint BBC/Smithsonian Network 2015 documentary about Welchman –The Forgotten Genius of Bletchley Park.. The Denniston book, Alastair Denniston, Code-breaking from Room 40 to Berkeley Street and the Birth of GCHQ, is both a biography and an account of signals intelligence from its early development to the birth of GCHQ. Denniston was the first Head of GCHQ and the book was launched at its headquarters on 7 September 2017 in honour of him.

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Peter Calvocoressi was born in Karachi, British India in 1912 before moving to England where he grew up, attending Eton and then Oxford University. During World War II, he worked as an intelligence analyst at Bletchley Park. After the war, Calvocoressi’s impressive career saw him working as a lawyer, a politician, a publisher, an academic, a journalist, an author and an historian. He died in Dorset in 2010 at the age of 97.Peter Calvocoressi was born in Karachi, British India in 1912 before moving to England where he grew up, attending Eton and then Oxford University. During World War II, he worked as an intelligence analyst at Bletchley Park. After the war, Calvocoressi’s impressive career saw him working as a lawyer, a politician, a publisher, an academic, a journalist, an author and an historian. He died in Dorset in 2010 at the age of 97. Joel Greenberg is a Canadian author and historian living in the UK who researches and writes about signals intelligence and its impact on two world wars. He is has written the authorised biographies of two key figures in the story of signals intelligence, Gordon Welchman and Alastair Denniston. The Welchman book, Gordon Welchman, Bletchley Park’s Architect of Ultra Intelligence, is the basis of a joint BBC/Smithsonian Network 2015 documentary about Welchman –The Forgotten Genius of Bletchley Park.. The Denniston book, Alastair Denniston, Code-breaking from Room 40 to Berkeley Street and the Birth of GCHQ, is both a biography and an account of signals intelligence from its early development to the birth of GCHQ. Denniston was the first Head of GCHQ and the book was launched at its headquarters on 7 September 2017 in honour of him.

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