Hint for Worlds Apart?

OK, I know it's not the latest thing--call it retro...

I'm playing Worlds Apart by Suzanne Briton (which I downloaded recently).
Does anyone remember the game?

I'm currently stuck in the part of the game in which it is midnight, the
moon is all red, and I'm talking to Saal. The hints aren't helpful in
getting me to the next stage.

I've already done the following here: (1) Joined Saal at the fountain, (2)
Talked with Saal at the top of the ch'nuka tree, (3) Gotten past the
guardian into the shelter, (4) Entered the imager. I'm not sure what is left
to be done outside of the imager. I've talked to Saal about almost every
game-related topic and even a number of other topics. :^) I keep waiting for
Saal to dig through the northeast passage of the imager, but with no
results.

What am I missing here?

Thanks in advance...

Joe