How do I get the basket?

Hint 1 of 8:

The port authority did say that he wanted an Atlantean artifact, so
find one.

Hint 2 of 8:

There's an Atlantis dig site on the mountain that you will want to visit.

Hint 3 of 8:

Did you notice the spindle next to the door in the site?

Hint 4 of 8:

You should have gotten something from Trottier to help you.

Hint 5 of 8:

Now read the Lost Dialogue to see if there is something you can do with it.

Hint 6 of 8:

Thera is supposed to be one of the Lesser Colonies of Atlantis.

Hint 7 of 8:

Put the Sunstone on the spindle.

Hint 8 of 8:

To make the tall horns red, put the "setting sun" on the top.  If you have
another message in the Lost Dialogue, the position of the dial is random and
you will have to follow the directions in the book.