Part 49

Insert the duplicate Guiding Beacon into Signal Slot B [OBJ 3].

Locate and switch seven of the eight possible Signal Towers from Slot A to Slot B.

Exit the Guiding Beacon Slots area by taking the lift down to the Upper Areas.

In the Upper Areas, go east. Wait for the patrolling Child to turn away, then pick the lock on the double doors in the north wall.

In this room, turn on the lights via the panel to open a nearby gate. You can find two vine arrows beyond this gate.

Locate the staircase leading down to the Basement & Exploratory Inventing Workshop.

Run down the ramp, cross the basement to the east, go down the lift, and enter the tunnel to the Exploratory Inventing Workshop.

Run west, then go up the ramp to the south to find a switch that turns off all lights in the main Workshop.

Go back down the ramp, then west, under the Watcher. Cross the Workshop and go down the ramp on the west.

Climb a ladder and go up another lift to find the SECOND SIGNAL TOWER. Pull the lever to switch it from A to B [OBJ 4].

Return down the lift to the Workshop. Exit the Workshop the same way you entered, or drop into the water (this route yields two water arrows but returns you to the Workshop entrance).

Go back up the lift to the basement.

Cross to the north-west corner of the basement. Find two moss arrows at the bottom of the elevator shaft.

Call the lift down and ride it up to the THIRD SIGNAL TOWER. Pull the lever from A to B [OBJ 4].

Take the lift back down and return to the Upper Areas via the ramp.

From the top of the ramp in the Upper Areas, go east into a large bay with a Watcher in the ceiling.

Disable or kite the patrolling Child away from the lift in the south.

Ride the lift up to the high platform. Take the lift to the roof in the back corner to find the FOURTH SIGNAL TOWER. Pull the lever from A to B [OBJ 4].

Go back down to the floor of the bay.

Proceed to the south-east of this hall and enter the area to the west, which contains two halls with machinery.

In the south hall, find the Lever on the north-east corner of the south-west bank.

In the north hall, find the Lever on the south-west corner of the north-east bank. Both Levers are at ground level.

Climb onto the machinery banks and platforms against the side walls to move around. Vent tunnels are also available.

A journal entry from Kelsus can be found in the connecting tunnel on the east wall.

Once both Levers are pulled, the gates will open. Head to the north end of the north hall and go through the open gates.

Move to the lift.