The girl on Victoria´s lap is her daughter - but not Elisabeth. That is Princess Maria Kyrilovna, the eldest of three children Ducky had with her second husband. That may be why you have not seen the picture in connection with Ella :-)
Oh! Sorry for my fault!
I always thought Elisabeth looked like her father but now I see she must have had much of her mother's feautures since this girl looks so much like Elisabeth to me. Yes, the all look very very sad. It must have been always with the mother (since her sister too said Victoria had 'always tragedy' around her) and not -only?- have been the unhappy marriage.
But I have another pic which I did not see here and this time I am right I hope
Isn't it sweet that she put her horse under the table? I used to play liket hat too, there was the stable