Police are appealing for information after banknotes worth tens of thousands of pounds were mysteriously found floating down a river.
A dog walker spotted the cash, which on first count police officers found to be about £60,000, in the South Drove Drain near Spalding town centre, Lincs, on October 25.
Officers who pulled the banknotes from the river say a large amount was damaged but a good quantity appear to be in fair condition.
Police are considering detailed forensic examination of the money and have been granted a seizure order by the Magistrates Court to investigate where it came from.
Detective Constable Steve Hull, of Spalding CID, said: "It isn't everyday that an amount of money like this is found and somebody must have information that will help the police trace the lawful owner. I would be grateful to hear from people who have genuine information to pass on to me."
Police are intending to consult with the Bank of England for assistance with a formal inspection of the money and a final accurate count.
For now the cash will remain with the police until the investigation is complete. If the money cannot be reunited with a legitimate owner then it will become the subject of a further court forfeiture order.
Anyone with any information they feel will help Lincolnshire Police is asked to contact them on 101, quoting incident number 154 of 25/10/13. Police reminded t he public that any claimant must have evidence of ownership.
The 10 top earning celebrities
Mystery river cash owner sought
At the age of 55, critics have been insisting that her finest days were two decades behind her. Her latest album sold fewer than 1 million copies, and her recent singles have failed to make the impression they once did.
But Madonna has silenced the critics - raking in an astonishing $125 million in one year. That's $25 million more than her nearest rival. Her $305 million wold tour was the major money maker, but her fashion and perfume brands helped too.
This is Madonna's biggest-earning year of all time - surpassing her previous record in 2009 of $110 million.
The veteran director had a hit with Lincoln last year, but the bulk of his $100 earnings comes from royalties from his earlier works. It can't hurt to have the Raiders of the Lost Ark franchise and the Jurassic Park films quietly making money for you. He also makes a slice from the Universal Studios theme parks. The combination means he's up a place in the rankings from last year.
The British 'Shades of Grey' author has faced harsh criticism for her writing style, but she is living proof that sex sells (70 million copies worldwide and counting). With earnings of $95 million this year she's not only the highest-earning author of the year, she's the third-highest-earning celebrity too.
The original shock-jock is pulling in $95 million a year by being the biggest name on US radio. He also made a rumoured $15 million as a judge on America's Got Talent - which has helped push him up from seventh place on the list last year.
Simon Cowell, the second Brit on the list, is still holding fast to his earning power - despite some ratings problems in the US. The X Factor and Got Talent format are worldwide sensations - all earning a small fortune for the TV mogul and soon-to-be father who brought home $95 million in a year. It has pushed him up from tenth place in the list last year - leapfrogging the likes of James Patterson and Michael Bay.
With earnings of $91 million, America's favourite author is reaping the benefits of being both very popular and incredibly prolific. Apparently one in four of all hardback books sold in the US are written by Patterson, and he continues to add to his body of work at an incredible rate - which has helped push him up from eighth to sixth place in a year.
With earnings of $90 million, Beck's various roles as a TV and radio host, conservative political commentator, author and businessman have seen the money flooding in. His official tagline is 'The Fusion of Entertainment and Enlightenment' - so there is a small chance that the money and fame (and moving up from 11th place on the list last year) may have gone to his head.
Earnings of $82 million put the Transformers director in the upper-echelons of the big earners. His blockbuster action films haven't always been a big hit with the critics, but have pulled in the crowds, guaranteeing him big money. He took a bit of a hit this year - with his earnings almost halving from a year earlier (when he was the second-highest paid celebrity). However, Transformers 4 should have him back on top next year.
Making $80 million this year, Bruckheimer's ability to produce Hollywood hits is certainly paying off. Having a back-catalogue that features the Pirates of the Caribbean franchise doesn't hurt. However, he could do with another mega-hit soon as he's down from fourth place on the list last year when he made $35 million more.
Her earnings of $80 million would have been even more if she hadn't had to pull out of much of her tour after suffering a hip injury.
Oprah Winfrey, meanwhile, came in 13th - knocked off the top spot last year, when she was bringing in $165 million a year, and seemed unassailable.