Investigate the tower

Journal
Samuel the farmer saw the black arrow in flight before it killed Tanya's son. he said it was moving very fast. More importantly, he said that it looked like it came from the tower than overlooks the market. I should visit the tower that overlooks the market and see if I can see both the docks and the market from there.

Stuck At Quest?

 * Get into the locked end of the guard tower and find the room with the four notes pinned on the wall and one more left lying on the table. Click and drag those notes into your inventory.
 * Find and talk to the guard Rolf. Type in the word "Accuse" and watch him admit to the killings.
 * Find Captain Cugel at the Guard Barracks slightly southwest of the tower and talk to him. Type in the word "Guard Rolf" and you can then proceed on with the quest.