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.