Tax inspectors don't tend to believe in magic

A tax inspector arrived at the front door of a magnificent 8 bedroom mansion in the depths of the countryside. 

"How have you managed to buy this luxurious mansion whilst your income is so low?" he asked the market trader who lived there. 

"Well" replied the trader, "When I was fishing last year, I caught a golden fish. When I took it off the hook the fish looked at me and spoke. 

It said: 'I am a magic golden fish. Throw me back in the water and I'll give you the most luxurious mansion you have ever seen.' I threw the fish back into the water and got the mansion." 

The tax inspector looked at the trader suspiciously. "And what proof do you have, to convince me that this preposterous story is true?" 

"Well, you can see the mansion can't you?"