Got first glowstone key from Sarellia. second one was not in the chest in the vault room, like the book says. can anyone help me with the second keys location.

I found the 2nd in a big room past Sarellia, off to the left & back a ways I think...there were two chests in the room, one in the rafters and one on the floor towards the back of the room. The 2nd glowstone was in the chest on the floor.
: )
Moni