Lily's letter
HEY QUIRKS!
I think I know what Lily's letter was all about. Let's remember what she said first. She said "Thanks for covering me up for tonight! Let's talk first before you head to the apartment"
To start, let's go back to episode 1. I have a theory that Faith went to the Pudding and Pie right after she encountered Woody and Bigby. At the Pudding and Pie, she found Lily's letter
The part where Lily said thanks for covering me up for tonight! might mean thanks for going to the Woodsman as I've told you!
Then there was this second sentence let's talk first before you head to the apartment The way she delivered the word 'apartment' sounds as if Faith already knew which apartment she was going to go to.
In my last post, http://www.telltalegames.com/community/discussion/91863/lily-s-death?new=1, I said something wrong about this letter. Faith went to the tenement BUILDING WHICH WAS NOT AN APARTMENT. So, the apartment that was mentioned in Lily's letter could have been "The Woodsland Apartment
Remember when Faith said she was going to stop by Bigby's apartment. Then Bigby told her how she knew where he lived. Then Faith told him, "everyone knows where you live, Sheriff" Lily could have talked to her about it.
I still don't know what they were going to talk about. Remember what Lily said before mentioning the apartment: "Let's talk first before you head on to the apartment
This might mean that Lily was involved in Faith's plan... right?
Please comment down on what you think! 
Comments
I think it's a red herring. I think it's there to counteract Lily being missing for two weeks. It is too convenient for the letter to still be on the floor when Bigby comes in.