CLUTCHING a brown wooden box caked in mud to his chest, 81-year-old flood victim Deryk Roth has vowed to never let it go again.

The box, containing the last possessions of his brother Milton, who died in a car crash in 1953, was swept away for the second time by floodwaters.

"It's been handed down the family to me," Mr Roth said yesterday.

"It's got Milton's Bible, polio vaccination report and his spectacles - he was very cross-eyed."

Mr Roth said he was speechless to learn his box of precious possessions had washed up in North Bundaberg - quite a distance from his East Bundaberg home, which was inundated with water up to its roof.

The box was found by Queensland Fire and Rescue Services officers during the flood clean-up, which sparked a social media search to try and reunite it with its owner.

Using the details on the polio vaccination reports, Bundaberg police officers were able to track down Mr Roth's brother in Monto.

Mr Roth and his wife, Beryl - who will celebrate their 59th wedding anniversary next Tuesday - lost most of their possessions to floodwaters for the second time in two years.

"We got a bit of stuff out but we lost all our winter clothes," he said.

"This is one of the most precious things I've got now.

"The Bible is still readable.

He added: "The fire brigade and emergency services have been unreal."