It had cluttered up Jack Harris’s dining table for almost eight years.
Nevertheless, the 86-year-old was determined to finish his five-foot long, 5,000-piece jigsaw.
And when he thought the painstaking process was complete, he stood back to admire his work – only to find a dog may have eaten the final piece.
Mr Harris has searched his home in Shepton Mallet, Somerset, for the missing piece but his family fears one of their two dogs has swallowed it.
They have even asked the puzzle’s manufacturer if they could provide a spare – but Mr Harris has taken so long to complete the jigsaw that Falcon Games has stopped making it.