Four special £5 notes worth an estimated £20,000 each have been put into circulation.

The fivers include a tiny engraving of author Jane Austen and quotes from some of her most famous literary works.

Artist Graham Short teamed up with Kelso art gallery owner Tony Huggins-Haig for the venture, which they hope will encourage more people to visit galleries.

The last piece that Mr Short sold, a portrait of the queen on a pinhead, sold for £100,000.

Mr Huggins-Haig, who runs the Tony Huggins-Haig Gallery in the Borders town, said: "We came up with the idea with the notes to commemorate the 200th anniversary of Jane Austen's death.

"It will get someone who potentially wouldn't necessarily go into a gallery, to visit. There are four in circulation for anybody to find."

The 5mm portraits of Jane Austen on the Bank of England notes are near a picture of Big Ben and alongside a tiny pound sign, while her quotes surround the the portrait of her.

Mr Short said: "The beauty of this is that you can't see the engraving at all, but when you turn the note and the light comes at a different angle it appears. I call it invisible engraving.

"I've no idea how much they will be worth but £20,000 is a conservative estimate - previous pieces I've done have been insured for more than £50,000. If somebody across Scotland finds they have one I hope they put it on eBay and get some extra money for Christmas."

Mr Huggins-Haig added: "It's almost like Willy Wonka and the golden ticket. Hopefully four wonderful people will have a great Christmas. Art is for everybody."