Pool of Radiance - Pyramid

I just entered the large pyramid north of Phlan using a rowboat on the north shore of the lake around the pyramid itself. The pyramid appears to be the source of the pollution in the river.

Inside there are teleporters, and I don't have a map. This is going to make things significantly more difficult.

Lots of torture equipment and alchemical labs. In one of them, I found a journal which has entries:

YOU FIND A NOTEBOOK. A TYPICAL ENTRY
READS, 'SUBJECT 213: PROGRESSING WELL,
SCARS HEALING, UNABLE TO TALK YET.
SUBJECT 214: DIED WHEN TREATED,
FAILED AGAIN...'