What a gripping story. i will need to go and re-read some of my old story snow, especially this one. It finally happened to me. I can only imagine when my computer got a virus, and word for word as you mentioned, words began to disappear of my computer. In fact Micro Soft even Micro Soft, disappeared off my PC. To this day I rely on Google Docs..
PS- I remember those manual Typewriter days.
I am glad you could remember the book, to re-write it. Very interesting reading. I like how you tied the bear to your window.
Oddly enough, In my poem Dem Alligator Boots, ... I purposely added my OWL in the story to be found the next day on my widow sill...