The teeth and jaw bone of a mammal which roamed the earth during the ice age are to be returned to their home town on Anglesey.
The jaw and teeth of the woolly mammoth
The remains were originally uncovered at Holyhead over 140 years ago.
They were saved because the local lord of the manor at the time was an amateur archaeologist who gave the remains to the Natural History Museum in London.
A special cabinet has been built at Holyhead Maritime Museum to house the objects at a constant temperature.
The jawbone and teeth were found by workmen from the London North Western Railway working in Holyhead harbour in 1864.
They did not realise what they had found, but the lord of the local manor, Lord William Owen Stanley was an amateur archaeologist who gave the items to the Natural History Museum in London.
Morlo (Morawelon and London Road history and heritage group) tracked the remains down before the maritime museum put a bid in for their return.
The woolly mammoth used to roam the land near Holyhead
"It is very exciting to be getting the remains back," said John Cave from the Holyhead Maritime Museum.
"We will have to get a full sized mock-up of a mammoth to display with the remains so that children can understand where they have come from," he added.
The maritime museum is now hoping the success will lead to more treasurers being returned.
"These are not of monetary value, but they are part of Holyhead's history," said museum vice-chairman Richard Brunell.