Next Project: Detangle!   AKA: Don't let the dog get the mail...

I got this really pretty yarn in the mail exactly six months ago. I left it in its envelope on the table. Came back to a shredded envelope and yarn knotted and strew throughout the dining room. Finally pulled it out this week to see the condition. Terribly tangled, but with patience looks to be completely salvageable. I've started detangeling it... I wonder how long it will take?