I wonder if it says
'With dearest love & x's to our darling Daddie from your loving little daughter & sonnie
Dora and Glyn'
Thus the younger child is Glyn (looks like a girl, but all babies wore dresses )and not the bear!!
Glyn is very much a Welsh name (looking at births in 1917ish)
So we need one with a corresponding Dora as sister . . . .
But I may be wrong, though the more I look at it te more convinced I am - esp the ie at the end of Daddie and Sonnie