A missing piece of Stonehenge has been returned to the site more than 60 years after it was taken.
A metre-long core from inside one of the prehistoric stones was removed during archaeological excavations in 1958.
Its existence remained largely unknown until 89-year-old Robert Phillips, who was involved in those works, returned the piece after keeping it for six decades.
Phillips, who has since retired to the US, said he wanted to give the artefact back ahead of his 90th birthday.
Now, English Heritage, which looks after the ancient monument in Wiltshire, says analysis of the sample may help establish exactly where the stones originally came from.