Published in 1859, Alfred Tennyson’s Idylls of the King was an instant literary success. Its original subtitle, “The True and the False”, is the central theme of the four poems of the volume, which all deal with misperceptions, misunderstandings and misinformation. The Idylls can be seen as a long and challenging pursuit of the truth, since they show the heroes lifting the veil on their partner’s real identity, facing the truth, or trying to define their true selves. The poems also raise moral questions related to good and evil within men and women. In other words, the Idylls may be read as a warning against misperceptions and corrupt behaviours. The Idylls became a source of inspiration for many artists, including the Pre-Raphaelites. During the Edwardian era, Tennyson’s work, raised to the status of a classic, was again published in illustrated editions. How did the artists chosen here—Eleanor Fortescue Brickdale, Florence Harrison, Jessie M. King and John Byam Shaw, most of them affiliated to Pre-Raphaelitism—illustrate the question of Truth and Falsehood? This thesis shows how the theme of truth is depicted and adapted in the illustrations. Despite their apparent faithfulness to the poems, the Edwardian illustrators distance themselves from the poet’s or the characters’ point of view, while implicitly criticizing it. Besides, they highlight the imaginary dimension of the text. Thus, their illustrations stimulate the reader’s fancy and his or her inner dream world.