I read the story when you posted it.
I don't want to say I do not believe it. It is just the way you write it that would make me jump onto the "this is fiction" train and ride it home.
don't get me wrong. I have found yarn in the strangest places around my grandma's home and have built quite the stash as a kid. I have never actually found a secret attic.
I DO write and publish though. Fiction, mostly.
If you write a book / story about this: make it sound less fictional, please. A book that starts in that tone I would not want to read... The story may be great.
If you write it: she finally finds a scrap book with the most ancient designs for cardigans, awesome instructions, knits them, becomes famous and has a hard time coming to terms with giving credit to the real inventor.
But then she names her fashion line like the girl who originally designed things. Becomes even more famous and makes enough money to buy the house she found the yarn in.
(yup, I write fiction, you can tell)