Thanks for your reply Tetraedge, but when I try to use it on the grave Arno says that He can't
do it because he doesn't even know the name of the person. After that I click the tombstone so I can see the name but he still won't dig. I have done everything else from your spoil
You also need to first use the cylinder with the gramaphone in the inn's attic. After I did that, I was able to open the grave.