 Even more desirable to collectors were the small number of postcards that had been written aboard "Titanic" during her maiden voyage and posted while she was in the harbours at Cherbourg and Queenstown.After the sinking, memorial postcards were issued in huge numbers to serve as relics of the disaster.They were often derived from 19th-century religious art, showing grieving maidens in stylised poses alongside uplifting religious slogans.