Beautifully written! It was short, but elegant, and it's the sort of work which would be delightful even if not expanded upon. One little thing, though: "There was no possibility of taking a walk that day" is the opening to Jane Eyre, not Pride and Prejudice, isn't it?

Overall, I liked the piece very much, but I don't think the last line did it justice. It seemed a bit awkward, two simple lines after such beautiful description. It lacked the punch that some of your other endings have.

"Her walk, a light dance on the brittle ground, barely disturbed the yellowish grass. In envied her natural grace, the way she so seamlessly fit into the garden's scene, the way the stray thorns from the rose bushes did not snag on her voluminous skirts and coat."
--That part was just so beautiful for me. I could see the image so clearly, and yet you left just enough to my imagination.

You did an excellent job at starting with someone else's work and taking it in a different direction. :)