LONDON (REUTERS).- The public have not laid eyes on the heavenly depiction of “The Seraph’s Watch” for over a century and many people thought the painting was lost. But now the work by pre-Raphaelite British artist Ford Madox Brown, depicting the serene gaze of two angels before a crown of thorns, will be exhibited at Manchester Art Gallery in northern England next month. Completed in 1847, The Seraph’s Watch was last displayed publicly in London in 1896, at which point the painting disappeared – and was even feared lost – until it was rediscovered in a private collection two years ago by the exhibition’s curator, Julian Treuherz. “When I saw the painting I knew instantly what it was. It had been regarded as lost but we all knew what it looked like from the copy made by Madox Brown’s pupil, Dante Gabriel Rossetti