# Literally steam in your own shit for a bit until the guard has left. Follow him, but before you do make a note of the hatch at the other end of the bathroom, you'll have to visit here again later once you've found Rope Arrows.
# Soon enough the trail will turn into a North/South corridor. On the right will come a ledge you can mantle up on, this is the only real Safe Space to hide from the guards if/when they spot you. It might be a good idea to wait here now while the guard you've been following turns around and heads back for the bathroom
# If you continue down the North/South corridor you'll eventually reach a spot with a market cart on the left, and a guard in front of a gate on the right. Just by the cart is a doorway with a dark enough shadow in one corner that you can hide there.
# Just to the East of this position is the hard part: An open area with a factory to the South and a passage leading North, and a small shed to the East. Two guards patrol here, one going from between the factory and the Northern passage, and another going sorta East/West through this area. They are the problem, and it's them you need to be aware of at almost all times.
# There are two good hiding spots here, one is at a tiny, specific place within the shed, and the other is underneath that roof between the factory and the shed. One of the guards will appear to peer into the darkness there, but unless he's spotted you somehow he won't ever go in there.
# Your exit is through the path to the North, but first you need the Gear from the factory to the South. Start by getting in there, preferably without beeing seen or heard, as there's very little room to hide in there. In the room with the elevator you can pull a lever to open the grate on the North side of the factory, severely cutting down your travel time once you have the Gear. Wait to open this until you're done in the factory, though.
# Sneak around on the first floor and find some flares and a Flash Mine. You will need every flare you can find, so grab them whenever you can. (There's a reason to get on the conveyor belt, let's see if you spot it.) While down on the bottom floor you'll see a small room that you can't enter. The Gear is in there in a box on the ground.
# To get in there, take the elevator up to the upper floor. Beware as an archer guard patrols up here, but he can be circumvented despite the cramped surroundings. Look for a rotating lever on a machine up there to open up a grate that gives you access to the rest of the upper floor of the factory.
# Go into this new area, then drop down into the inaccessible room from above and get the gear. It should not be too much of a problem to get out of the room afterwards.
# With Gear in hand, make your way over to the Northern path mentioned earlier, then take the exit on the right in there. It should lead to two places, a conveyor belt with a crusher on the bottom and a dark sideroom. In there are not just more flares, but also a panel full of gears with one gear missing. Put the Gear in there and pull the lever nearby. The grate at the end of the Northern Path will now open.
# Make your way into the yard beyond the grate. What you're looking for is a small opening in a pipe on the ground. Once you drop down there the adventure begins.
# If you feel up to it, fine-comb the area you just finished before dropping into the pipe. There's a water arrow to be found, some flash bombs and a healing potion. The window above the Northern Path (and above the conveyor belt where the crusher is) requires a Rope Arrow, so forget about that until later.
# While on your new adventure you will eventually find a Blackjack and some Rope Arrows. The lock picks will only come into play once you reach the surface again, so make a note of any door that you can't unlock and try to find your way back to it.
# Enjoy the ride.
