Flooded Archives - Returning for the Third Mural (Part 2)

Shoot a climbing arrow into the rough wooden wall...

...and use it to climb up.

Slide down the slope into the tunnel below.

Continue to a deep chasm. Grapple-swing forward and grab onto the horizontal bar with the red flag, which then swings around to the right, depositing Lara on the ledge below.

Continue forward. Scale the climbable wall...

...to the top.

Then follow the passage to the next chasm, which you must cross using a narrow wooden beam.

Jump down across the next wide gap. Crawl through the low opening on the right.

And continue through a low-ceilinged passageway...

...until you see the mural (3/3) on the right wall. It is Years of Plenty from the Byzantine Inscriptions series (Greek).