Skip to Main Content

Cromwell's Spy

From the American Colonies to the English Civil War: The Life of George Downing

Published by Pegasus Books
Distributed by Simon & Schuster

About The Book

A vivid biography of the elusive George Downing, a Puritan from colonial Massachusetts who became Oliver Cromwell's chief spy and a key figure in the Restoration.

Downing Street is synonymous with political power, perhaps only second to Pennsylvania Avenue. But for the builder behind one of the world's most famous streets—George Downing—it was a mere retirement project.

Throughout his storied life, Downing would be a soldier, a politician, a diplomat, and a spy. He came of age as a pioneer in colonial Massachusetts, graduated from Harvard, crossed the Atlantic to sign up for the English Civil War and fast became Oliver Cromwell’s chief of military intelligence. He was one of a close group of now-forgotten Americans in Cromwell’s circle who exerted enormous influence upon English political life during their Civil War.

Throughout his life, Downing was always at the center of events, engaging with the most illustrious men and women of his times. His uncle was the governor of Massachusetts; his cousin the governor of Connecticut. In England, his patrons were Oliver Cromwell and King Charles II. The famous diarist, Samuel Pepys, was his clerk; the great poet, John Milton, prepared his letters and dispatches. William of Orange was godfather to his son; his next-door neighbor was Queen Elizabeth of Bohemia; and when Downing finally built his street, his surveyor was Sir Christopher Wren, architect of St Paul’s Cathedral.

He would leave his mark on American soil as well. He played a key role in the foudning of New York by helping to wrest Manhattan and Long Island from the Dutch. Yet he remains one of the most elusive figures of his age. In Dennis Sewell's rich and vivid Cromwell's Spymaster, Downing emerges as the extraordinary, enigmatic, and endlessly fascinating anti-hero of his own life story.

About The Author

Dennis Sewell is a writer and broadcaster and a Contributing Editor of the Spectator. For more than twenty years he was on the staff of BBC News, where he was a presenter of Radio 4’s Talking Politics and BBC World Service’s Politics UK, and a reporter for BBC2’s Newsnight. He is the author of Catholics: Britain’s Largest Minority and The Political Gene. He lives in London.

Product Details

  • Publisher: Pegasus Books (July 2, 2025)
  • Length: 304 pages
  • ISBN13: 9781643135403

Browse Related Books

Raves and Reviews

"The best book to have come out of the Darwin centenary."

World Magazine (Praise for The Political Gene)

"The only Darwin book that actually explains what really matters - the consequences of the adoption of his theory for the conduct of human affairs."

– David Cox, Books of the Year,, Evening Standard (Praise for The Political Gene)

"Intriguing. Sewell looks at how politicians have warped Darwinian ideas for their own ends, from eugenics to racism, in a litany of crimes against humanity that range from the deluded to the downright evil.:

The Big Issue (Praise for The Political Gene)

"Richly entertaining. Excellent."

– A. N. Wilson, The Literary Review (Praise for Catholics)

"Sewell scores well in his command of history, better in his turn of phrase, and best of all in his delightful vignettes."

– Peter Stanford, The Independent (Praise for Catholics)

Resources and Downloads

High Resolution Images