Just recapping here;
Nicholas James Baker died 15/8/1918 at Baghdad. Married Florence Edith Baker Q2 1908, Pontypridd. This ties in with the probate calendar entry.
Children;
Kenneth George Q1 1910 Abergavenny
Died 1913.
Dora E Q2 1914 Abergavenny
Nicholas Glyn Q4 1916 Abergavenny
The ages of the two children in the photo seem to fit with this family, 4 for the little girl & about 2 for, what now might be a boy...Nicholas Glyn. Probably called him Glyn to differentiate between father & son.
In this context the writing on the postcard makes a little more sense, 'With dearest love & kisses to our darling Daddie from your loving daughter & Sonnie. Signed Dora & Glyn'.
Dora being the 4 year old daughter & Sonnie the bear?

Speculation I know

Jane