Correct me if I'm wrong, but aren't you stupposed to stake Bodhi's coffin for it? You won't be able to loot the Lanthorn and continue the plot if you have not done this.
Sage plays a paladin, because other classes would be frowned upon for laying their hands on a wounded companion
[url="http://www.gamebanshee.com/baldursgateii/walkthrough/bodhiconfrontation2.php"]Here[/url] is a link which will probably better tell the location of the coffin (and the Rhynn Lanthorn)
"As we all know, holy men were born during Christmas...
Like mr. Holopainen over there!" - Marco Hietala, the bass player of Nightwish