Based on the preview for next week's episode, I became curious when Lord Grantham exclaims angrily "fashionably late is one thing." The obvious conclusion would be that someone's late for Edith's wedding. However, I wonder if that's an intentional mislead. I looked at the scene a few times, and I'm fairly certain he's talking with Mary. I heard rumblings a little while ago that the Pamuk scandal would be revisited. Could Carlisle have finally printed it and LG has just found out? It's later than the Crawley family assumed it would be printed, so it might explain Lord Grantham's comment.
Also, I thought I heard rumors that Mary actually sells the story in exchange for money to save Downton. The timing makes sense. The attempt to get money from Martha was unsuccessful. From the preview, it appears that Matthew remains unwilling to hand over his inheritance from Reggie Swire. The Crawley Family is even looking at a new house. Mary might feel the situation is desperate and does what she feels she must to save her family home.
Just some thoughts. Of course, I might be totally off-base. I usually am.