The Boundless Deep: Young Tennyson, Science and the Crisis of Belief

By Richard Holmes

What happens when a poet lives too long – and becomes respectable?

Alfred, Lord Tennyson might provide one kind of answer; his reputation cast into deep shadow by the beard he sported in later life and his elevation to Poet Laureate during the high Victorian era, aged but 40. Before this, his cheek was clean-shaven and his poetry brimmed with radical ideas of science, challenges to belief and an imaginative response to the horrors of a godless universe.

From the prize-winning and bestselling biographer of Shelley and Coleridge, and author of the landmark, critically acclaimed The Age of Wonder, this is a book about the new science and scepticism of the 19th century; about ideas of geology and deep time, the vast beauty and the terror looming before all those who saw deeper into the stars and studied the new cosmology. Tennyson grew up amidst this turmoil, his imagination and intellect driven by the eruption of three new fundamentally transformative scientific ideas – biological evolution, the notion of a godless, unpitying universe and of planetary extinction. These were as terrifying to Tennyson as climate catastrophe is to us today. They inspired him to grapple with ideas of his own destiny, the threat of suicide and depression, the struggle between love and loneliness, intellectual hope and spiritual despair.

As a young undergraduate, Tennyson wrote a 15 line sonnet ‘The Kraken’ – the sea monster of deep Time. A combination of ancient folklore and modern marine science, it was inspired by his lonely wanderings along the wild North sea beaches of Lincolnshire – what he termed ‘the spine-bone of the world’. This monstrous creature becomes a vision or voice which rises out of the sea, out of the waves, out of the ‘Godless deep’.

Format: Hardback
Release Date: 25 Sep 2025
Pages: 384
ISBN: 978-0-00-738693-2
Price: £25.00, £25.00 (Export Price) , €17.99
Richard Holmes is the author of The Age of Wonder, which won the Royal Society Prize for Science Books and the National Book Critics Circle Award and was one of the ten New York Times’ Best Books of the Year in 2009. His balloon book, Falling Upwards, was chosen as a Best Book of the Year by seven newspapers in 2013. His other biographies include Shelley: The Pursuit (winner of the 1974 Somerset Maugham Prize), Coleridge: Early Visions (winner of the 1989 Whitbread Book of the Year Award), Coleridge: Darker Reflections (shortlisted for the Samuel Johnson Prize and winner of the Duff Cooper Prize), and Dr. Johnson & Mr. Savage (winner of the 1993 James Tait Black Prize). This Long Pursuit completes the autobiographical trilogy begun in Footsteps (1985) and Sidetracks (2000). Holmes was awarded the OBE in 1992, and was elected an Honorary Fellow of Churchill College, Cambridge, in 2010.

PRAISE FOR THIS LONG PURSUIT -

‘No biographer is better than Holmes at evoking the thrill of the chase….elegant ….fascinating…entrancing' Sunday Telegraph -

'Exhilarating…instructive and delightful…finely observed…generous and hugely enjoyable' Daily Telegraph -

'Romanticism and Science are justly reunited in Richard Holmes's new book….a revelation….thrilling' Independent -

'Vividly conveys the compelling fusion of art and science in the 18th century…his is a book to linger over, to savour the tantalising details of the minor figures…’The Age of Wonder' allows readers to recapture the combined thrill of emerging scientific order and imaginative creativity' Financial Times -

'Wonderfully engaging…Holmes brilliantly illuminates the human and subjective aspects of science-making' Scotsman -

“The Age of Wonder gives us…a new model for scientific exploration and poetic expression in the Romantic period. Informative and invigorating, generous and beguiling, it is, indeed, wonderful” Guardian -

'delicious…exuberant and thought-provoking' New Statesman -