I lost a bag( black and dark blue) dimensions like small back for a handbag in airplane

Please help if you can, I lost a bag today(09.10.2011) in bus 78a from livvelly walley to city center ( I was on cc at 12.30 ) or cc on front on National Bank. It was nearly empty but have some documents and currency. I hope it will be a honest person which gave me back.