Gah, sorry about not responding, RL stuff gets nuts sometimes!
Alright, I see a lot of people having trouble with Talbot, so I'll tell you all the big secret. The fenced-off area nobody can get into, the one blocked off by the Family guards, has a secret way to access. When you first enter the town, there's a house on the left, with a pine tree just below it. Walk behind that tree, until you're right up against the wall (you should be right below a white flower, if that helps any.) and press enter. It's like magic! Now you can grab to last clue. Take the ladder up to leave that area, and talk to the homeless man again. Ask him every question at least once, then go back to the guard by the door.
When you get into the castle, seriously, explore a bit. You'll need it. Do NOT just go through the center door.
I hope that helps, and I'll try to address any issues more promptly from now on.