How to Solve Hunted The Demon's Forge Father's Crypt Riddle?

I am playing Hunted the Demons Forge and I am at the Fathers Crypt riddle. Now I got both statues lit and I went into the first room once you can cross the bridge. I fought all the skeletons and now I can not get the second door open, it shows a picture of a bone but I can not seem to find the piece any where. Any help would greatly be apperciated.