The Crawleys are a family divided, one branch Yorkist and the other Lancastrian. In summer 1485, the world changes for all of them when King Richard is defeated in battle by Henry Tudor. Mainly M/M, but featuring Sybil and others.
This was written before 4x06 and posted on tumblr then. AU now, obviously. It's what I thought should happen with the Edith situation but didn't believe really would (and it didn't). Title from "Let it be."
Matthew and Mary meet in 1915 under rather peculiar circumstances.