You're now back at the starting point. Go to the right end of the ledge (when facing across the alley) and drop down onto the square grate below.

Step off the edge to land on the angled roof, slide back, and grab the edge.

Pull up and immediately backflip onto the ledge behind.

Kill a crow that flies in from across the alley. Then throw the switch...

...to raise a green trapdoor on the outside of the building across the way.

Jump straight up and grab onto the overhead grating. Monkey swing to the other end of the grate and drop down on the ledge with the zip line handle. A dramatic sound effect hints of danger, but you won't actually meet the next enemy until you cross the alley.

Ignore the small medi pack on the little roof across the way. You'll get it soon. For now, ride the zip line down to the end. Lara will let go and land on the sloping roof below. Hold Action to grab the edge of the roof as you slide back.

Let go and then quickly grab the crevice below. Traverse to the right and pull up onto the green trapdoor.

Kill the guy with the gun who emerges from the doorway ahead.

Pick up the small medi pack he dropped.

[Part 2 | Return to the Thames Wharf Walkthrough]