The photograph is dated 1918, with the following message written on the back:
“With dearest love and kisses to our darling Daddie from your loving little daughter & Sonnie (?) Dora & Glyn”
A further line says "taken on baby's birthday March 4 1918, one year and five months old"
"During the last fourteen months we had been hopeful that the search would result inhim being reunited to his family" said Bristol Airport's Jacqui Mills.
"We have not been successful in this search and have drawn a blank".
More top news
There may be a few clear spells to start the night but towards the early hours of tomorrow morning things will turn wetter from the west.
Snowdonia is one of five locations battling it out to be crowned the best place in Wales in this year's Special Places competition.
Falling milk and lamb prices have prompted hundreds of farmers to demonstrate outside retailers’ depots and supermarkets.