An intellligent thief

Mr. Grey had a nice shop in the main street of a small town. He sold jewellry, watches, clocks and other things like those. All went well for some years, and the Mr Grey shop was broken  into at night twice in one month, and a lot of jewellry was stolen each time. The police had still not managed to catch the thief three weeks later. So Mr Grey decided that he would to try to do something about it. He, therefor, bought a camera, fixed it up in his ship so that i would photograph anyone who broke in at night, and put some very cheap jewellery in front of in for thief.

A few nights later, the thief did come again, but he did not touch any of cheap jewellery that Mr Grey had put out of him. he took thecamera. It was worth 150 pounds.