Can't find Marten's tomb!Can't find sledgehammer!I found Chaos Moliri and Astal Dominae, but I can't find Destinae Dominus! Please, help!

if i remember correctly, the sledgehammer is in or by a boat on the beach in Sea Caves (or maybe just the board you need is there) or in the caves somewhere...Marten's Tomb is definitely in the Sea Caves, you need the board and spike shoes to cross a hole. Sledgehammer only accesses a door you can't open until you've been in Marten's Tomb anyway. (it's the 'shortcut' out)

The sledgehammer is on the beach before you get to the ship and the plank in the sea caves.

**** Spoiler Alert ****

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all walkthroughs
http://www.volberding.com/Wizardry8/Wiz8Main.htm

sea cave walk through
http://www.volberding.com/Wizardry8/...dTRangWalk.htm

I need help with this same area.I made it past Nessie..through the shallows and to Bayjin, but can't for the life of me find the caves. I've looked at the spoiler above, but its not clear to me where they are exactly.. the part where the tomb.. etc is.
HELP!!!
Thanks

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The entrance to the sea caves is in a different tunnel from the one to Bayjin in the Shallows. Go back from the Bayjin entrance, drop back down and take a right. Go up to the next tunnel. When I explore an area, I always check the automap before I leave to make sure that it looks like I've gone everywhere.