.. How do I (finally) get across the river of fire?

After you remove your chains but before you tackle the bridge, turn left behind the small throne and go down the path to find Grigor's letter.

Wow. You didn't need to read that to win the game, but wasn't it interesting?

Okay, back to the throne room. There are two thrones here. The big one on the right has the remaining seeds in the circle on the top; take them.

The throne on the left has a little panel beside it; zoom in on it to find the bridge controls. Read to the end of this hint for a step by step.

The goal here is to move the pieces on the bottom row to match the pictures on the top row.

Note that this isn't just the right colors in the right places; they also have to be turned the right way.

In order to turn the pieces the right way around, you'll need to move them into the slot in the center wheel, then turn the wheel and take the piece out on the other side. Repeat until the orientation is right.

Before you start, notice the orientation of each piece and think about how many times you'll need to flip it before it's pointing the right way.

Any way you do this is right, but here's one way I know works:

Fire Bridge Controls

What am I doing with these seeds?