When I saved and quit game last night, Tarquin was on the deck of Lady Vengeance and holding both pieces of the Anetheum. Today when I start up the game from that save, he is no longer on the ship and is now wandering around at the cemetary gates where I initially got the quest to bring him the two parts of the Anetheum.

He says he's just looking for some "odds and ends" before going back to the ship. The only option I have for dialog is "End".

I was all set and planning to sail off to the Nameless Island first thing. Should I leave without him or do I really need the Anetheum?

He is also gone from the ship in my earlier saves as well.