Wedderburn, vol. 16, pp. 427–87.) The year 1859 also marked his last tour of Europe with his ageing parents, during which they visited Germany and Switzerland. Turner Bequest Ruskin had been in Venice when he heard about Turner's death in 1851. Being named an executor to Turner's will was an honour that Ruskin respectfully declined, but later took up. Ruskin's book in celebration of the sea, The Harbours of England, revolving around Turner's drawings, was published in 1856. In January 1857, Ruskin's Notes on the Turner Gallery at Marlborough House, 1856 was published. He persuaded the National Gallery to allow him to work on the Turner Bequest of nearly 20,000 individual artworks left to the nation by the artist. This involved Ruskin in an enormous amount of work, completed in May 1858, and involved cataloguing, framing and conserving. Four hundred watercolours were displayed in cabinets of Ruskin's own design. Recent scholarship has argued that Ruskin did not, as previously thought, collude in the destruction of Turner's erotic drawings, but his work on the Bequest did modify his attitude towards Turner. (See below, Controversies: Turner's Erotic Drawings.) Religious "unconversion" In 1858, Ruskin was again travelling in Europe. The tour took him from Switzerland to Turin, where he saw Paolo Veronese's Presentation of the Queen of Sheba. He would later claim (in April 1877) that the discovery of this painting, contrasting starkly with a particularly dull sermon, led to his "unconversion" from Evangelical Christianity. He had, however, doubted his Evangelical Christian faith for some time, shaken by Biblical and geological scholarship that was claimed to have undermined the literal truth and absolute authority of the Bible: "those dreadful hammers!" he wrote to Henry Acland, "I hear the chink of them at the end of every cadence of the Bible verses." This "loss of faith" precipitated a considerable personal crisis. His confidence undermined, he believed that much of his writing to date had been founded on a bed of lies and half-truths. He later returned to Christianity. Social critic and reformer: Unto This Last Although in 1877 Ruskin said that in 1860, "I gave up my art work and wrote Unto This Last... the central work of my life" the break was not so dramatic or final. Following his crisis of faith, and urged to political and economic work by his professed "master" Thomas Carlyle, to whom he acknowledged that he "owed more