You're facing a gear. Proceed inside the fortress and go left. As you enter the room, face the throne. There is a small indentation on the bottom right-hand corner. If you click on it, a door appears. Go inside and you'll find the red page inside the bottles. Now go into the other room, where there's a weird looking object (the simulator) next to the throne. There's also an indentation next to the throne, where the blue page can be found. If you explore the rest of the rooms, you'll find a note from Achenar to Sirrus on a wine shelf. Achenar claims that Sirrus is greedy in the note.

Go over to the simulator. It demonstrates the rotating of the Island. Push up the left handle, then the right. Pulling them back down again after rotating will yield a sound depending on the degree of rotation. You'll need to be familiar with all four sounds for 90, 180, 270, and 360 degrees. Ninety degrees sounds like a high ping, 180 like a spring coiling, 270 like a bird flapping its wings, and 360 like a dull, hollow, metallic sound.

If you retreat into the hallway, you'll see a small red button on the wall. When you click it, the floor drops down. You'll see a display with two upside-down "c"'s. Line them up until they are red in color. Turn around and go back up the stairs, click the red button (thus elevating the floor back again). Walk into the elevator.

Choose the "up" button in the elevator. Once on the top floor, click the middle button and hurry and get out of the elevator. It'll descend half a floor and you can climb in on top of it. There're controls on top of the elevator. You can now rotate the fortress by pushing first the left and then the right lever, waiting, and then pulling them both back down to check your progress. You need to move it 180 degrees (that's the spring coiling sound).

Rotate the island 180 degrees and 90 degrees to get to those respective islands. Each one holds two of the four symbols you must enter to be able to return to Myst. There really isn't anything on the islands but the symbols (Remember, the second time around to get the page, that you didn't get before and don't move the fortress! Just grab the page and enter the symbols. It's still the same!). Once you have the four symbols, simply enter them into the machine on the original island you started at (yes you have to move the fortress back!). The symbols are:

1. upside down "c".
2. opposite pointing triangles flanking a rectangular box.
3. three small triangles pointing up towards a ball.
4. the left side half of a full moon.