Lost cargo box

Recently, Sirlien living in Kuhn sent me a painting, but I haven't received it yet. I got in touch with him to check and he says he definitely sent it. While asking around, I found out that the delivery man was attacked near the Sealed Mine and ran away, leaving the painting behind. I'm in a fix. Many people want Sirlien's paintings because they have magical powers. I want you to find the Discarded Cargo Box at the entrance of the Old Mine. Unless something happened, I suspect Sirlien's Painting will still be in the box.

Get me the Discarded Cargo Box from the entrance of the Sealed Mine. I'd like to go there in person, but as you can see, I can't move. There are always monsters in old mines, so be especially careful.

Great! You found Sirlien's Cargo Box. Oh, no! The magic cast on this box to protect it has already been broken, so I'm certain someone was after it. I'll have to find out who. I'm sorry, but can you wait for a bit?