There was only one thing in the room that was different.
For a moment or so he couldn't see what the one thing that was different was, because it too was covered in a film of disgusting dust. Then his eyes caught it and stopped.
It was next to a battered old television on which it was only possible to watch Open University Study Courses, because if it tried to show anything more exciting it would break down.
It was a box.
Arthur pushed himself up on his elbows and peered at it.
It was a grey box, with a kind of dull lustre to it. It was a cubic grey box, just over a foot on a side. It was tied with a single grey ribbon, knotted into a neat bow on the top.
He got up, walked over and touched it in surprise. Whatever it was was clearly gift-wrapped, neatly and beautifully, and was waiting for him to open it.
Cautiously, he picked it up and carried it back to the bed. He brushed the dust off the top and loosened the ribbon. The top of the box was a lid, with a flap tucked into the body of the box.
He untucked it and looked into the box. In it was a glass globe, nestling in fine grey tissue paper. He drew it out, carefully. It wasn't a proper globe because it was open at the bottom, or, as Arthur realized turning it over, at the top, with a thick rim. It was a bowl. A fish bowl.
It was made of the most wonderful glass perfectly transparent, yet with an extraordinary silver-grey quality as if crystal and slate had gone into its making.
Arthur slowly turned it over and over in his hands. It was one of the most beautiful objects he had ever seen, but he was entirely perplexed by it. He looked into the box, but other than the tissue paper there was nothing. On the outside of the box there was nothing.
He turned the bowl round again. It was wonderful. It was exquisite. But it was a fish bowl.
excerpt from Douglas Adam's "So Long and Thanks for All The Fish"