i thought I had all the parts for the astrolab, but I seem to be missing one. One looks like a gear, one looks like the main part of a pump and one has a bulb on the end of a tube. Which one am I missing and where should I go back to look for it? Thanks.

Loki

There is one in each tower, plus one more in the central area where you take the elevator to an otherwise inaccesible area on the level below the area where you can access the towers.

Thanks, Red Dragon. I forgot to go back to Kaylessa and tell her her men were dead. Then she attacked me even though she asked me to do the dirty deed. After I dispatched her to the great beyond, I found the fourth part of the astrolabe on her. Thanks for your help.

Loki