Spoiler!

Fable II Guide - Spoiler

If you didn't choose the family option at the end of the game, you won't have got Rose's letter. If you really want to know what it says, but don't want to have to play through again, here it is in full:

"Dear Sparrow

I woke up today in such a peculiar place. It's like a great big forest, with lots and lots of trees that go on forever. I was scared at first because I couldn't find you, but there's someone here who says he knows us, knows our family. He told me his name, but I keep forgetting it. Weird. I think he's a king or something. He's thin and wears a hood and looks scary, but he's nice and I feel safe with him here. I hope your okay, Little Sparrow. Somehow I know that it's all going to be alright and we'll be together again one day. He promised me.

Love

Rose"

The general consensus is that the figure Rose talks about is either Scythe, the hero from the first game, or Jack of Blades, a character in the original, but who died in the game. We await the next Fable, or downloadable content with anticipation!