This is the tunnel that's straight ahead as you enter the main room.
Hint 2
At this stage of the game, there's not too much to find here, but there are some things to take and note.
Hint 3
At the very end of the tunnel, there's a beautiful mural of a cat and a whole bunch of birds of many types. It'd be a good idea for you to use your cell phone to take a picture of the mural for later.
Hint 4
Embedded in this mural is a brown glazed plaque that Nancy wants to take but can't. You'll need a tool designed for prying or breaking things.
Hint 5
Have you been in the antiquities tent yet? You'll find what you need there.