When pictures are erased, they aren't always gone for good. What gets erased is the "index entry", so to speak, of where the file was located. Unless the spot where the picture was located has been written to, the data is usually still there. If you have a computer with a card reader to put the card in, or even a USB cable to use, you can run a free program called "Recuva" [Google it]. I've been able to recover lost pictures this way.