What is in the cylinder Eragon?

Eragon blinked as he remembered the object that Thalia had handed him, "I don't know but let's find out shall we?"

I wonder if it has anything to do with the comment you made in the last meeting with her, Saphira

He peeled back the wax seal bearing Nasuada's insignia at the top of the cylinder, revealing a tightly wound piece of paper. Taking it out of the cylinder was annoying but he eventually got it out and read the following:

Eragon,

I have just come from interviewing the Half-Breed Thalia before she leaves to meet you in Breoal Abr Shur'tugal. She is a strange development in the relationships between elves and humans in regards to the romantic side of the relationship. This opens a door that we were not prepared to deal with, though it has been some time since the opening of relations between humans and elves, we cannot encourage such relationships without knowing its consequences. Normally, I would've gotten answers from Elva but she says that she can't feel anything from her and my mages cannot find her aura in their minds eye. The one bit of information that I did get was from Angela the Herbalist (who, by the way, we thought was dead until she shows up the day Thalia arrived on her dragon) who told me was that the amulet that was around her neck must have some sort of spell on it, though she couldn't tell me what the spell was for.

There are too many questions that cannot be answered without talking to Thalia directly and she bats away questions with silence. Even Arya didn't know that much about her than the few stray mentioning from Thalia herself. I don't like being kept in the dark, especially when it comes to something that revolves around the wellbeing of both the human and elvish race. As your liege lord, I order you to get as much information from Thalia about herself as possible. No matter what the cost is, the safety of future generations and relations between us is more important than someone's feelings being hurt.

Please inform me of anything you discover,

Nasuada

Eragon sighed as he rolled up the letter, "I figured that she was going to demand that."

And what are you going to do? Saphira lowered her back, allowing Eragon to leap onto her back, I'm sure that there have been plenty of people who tried to talk to Thalia but it sounds like they haven't gotten anything from her.

"I'm not surprised that she is a mystery. Btharna is pretty overprotective of Thalia which makes me think that she has a history of being misunderstood and overanalyzed by people to the point of needing that protection once she became a Dragon Rider and needed to get into the public eye in order to get the help she needs." Eragon leaned back as Saphira took off, "I do agree about needing to know more about her, specially her inexplicable ability to hide her aura. However, Thalia is first and foremost my student, my mission as a teacher is to ensure that she gets the tools to survive as a Dragon Rider. Also, I never appreciated being prodded and poked back during the war so why should I put her though something that could be potentially even worse than what I went through. We'll see how she feels tomorrow and then we can decide what to do."

You're becoming very wise little one.

"Yeah… Funny how thirty years of being the teacher to the next generation of Dragon Riders changes you."