An American whose grandfather was a German photographer in WW1 is searching for the families of Prisoners of War he photographed.
Johh Heinsen has already travelled to Merseyside to meet the grand-daughter of Captain Thomas Box.
The captain was one of 30 British Prisoners snapped in a photograph taken in 1917.
Now the search is on to identify the others.
Our correspondent Amy Welch was at today's emotional meeting.