CLICK). The exhibition opened today and there is additional news. For the first time ever the Gallery will get out of storage its 67-feet-long panorama The Funeral Procession of Arthur, Duke of Wellington (1853) a hand coloured print by Henry Alken and George Augustus Sala. Shown is one detail: The Late Duke's Horse Led by His Groom. Note the Wellington boots draped over the back of the horse. This is a free, one-hour viewing on 18 June, the date of the battle of Waterloo. If you can't make that date, the Gallery has provided an app on iTunes to allow you to peruse this panorama at your leisure, cost £1.49 (CLICK).