His body was carried in a plain black coffin and placed in a large stone grave.

BBC: Ferrer was buried in a simple black coffin

"It's one of the largest and finest in the collection of early medieval carved stone grave slabs and crosses to be found at Iona Abbey, " he said.

BBC: St Oran's Cross from Iona put back together in Selkirk

The casket was lowered into a grave and covered with stone slabs, as wailing crowds jostled around the burial site.

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Joseph Collis is said always to have regretted taking the stone from Shackleton's grave on the island.

BBC: Stone returned to Ernest Shackleton's grave after 75 years