You will need a spade.
There's talk that there's still treasure to be found in Skalitz...
- Find the treasure under the dove-cote.
In Rattay, Kunesh has survived the attack on Rattay and been forced to beg. Henry will go to talk to him about the debt he owed Martin, which was never paid. Kunesh, penniless and as bad tempered as ever, might need some 'reminding' to get him to admit that he now, according to the law, owes Henry.
You will need a spade to dig up the loot. Return to Skalitz and follow the map marker to find the dovecot, then start digging. There, you will find Beran has buried 50 and an expensive cup, which is worth 200 . Take it back to Rattay.
There, you have a few options. Firstly, you can sell the cup and keep the groschen. Nobody will know, and the quest completes as soon as you find the stash.
Secondly, take it to Beran's wife. She will ask about the groschen you found, and you can either give it to her and lie and say you only found the cup. Go visit Beren afterwards, who is horrified that you gave his cup to his shrew of a wife. However, he will still reward you with 20.
Alternatively, take the cup straight to Beran. He'll ask about the groschen, but whether he believes your lie or not, he won't pay you if he doesn't get it. But if you feel comfortable with stealing from a beggar, you get to keep the money you found instead.
Finally, go back to Kunesh and tell him the treasure belonged to Beran. Then, either forgive his debt, or tell him he still owes you. However, he doesn't have any money, so don't expect to make much.