Cottage?

Is this the cottage?

Doreen on a horse?

The same person?

Two of these photos are labelled Hilda, the third one has no label. Do you think they are the same girl? And I assume Hilda is Hilda Sanford, but is she the Hildegard I always heard Grandma refer to? Did they still know each other after I was born?

And what about this set of three? Hilda?