Embroidered Book Cover - The Embroidering Part 3

I have started working with check purl. There are a number of small bits strewn around my room now that I will only ever find with my feet.
The idea of randomly putting down the bits of purl is hard for my brain to be ok with, but I think it's working out.
Hard to take a good picture of, though.

I decided it was worth showing what the size of this piece is. That's a normal sized thimble.