I have searched the floor of the seas to the west of Brimloch Roon and can't seem to find an isle with a cart or a treasure of any kind. The map description is a bit weird . . . am I in the right area or should I be searching somewhere else. I have given up and gone on to the pyramid. Will I need anything special (besides my breather/masks) to obtain the treasure?

---NOT REALLY A SPOILER - IF YOU HAVE THE MAP WHICH CAME WITH THE GAME---

The sea to the west of Brimloch Roon is the Enchanted Sea. Here you will find Skull Castle and the Tomb of Anephas (a.k.a. Shrine of Isis).

There is a second sea, the Lost Sea. This is hard to get to. CLUE: Talk to Anephas himself.

Only then can you think about the cart, Pirates Treasure, Pyramid of Cet, Lost City of Collasium etc.

I was kind of hoping that was the case (you can see there is a sea to the west of Talrik ship but I couldn't get to it. . . . am in the pyramid now collecting all statues and ash trays. Had to quit as I caused a pillar to go up that is now stuck and am very tired. Hope I don't have to do this place from the beginning. Thanks so much, now I can focus on the temple.