You can only do this AFTER he sees you. The best way is when you listen to the convo between Bo, Rusl and the father of Malo and Talo walk back and pass the bridge. Then beth's father sees you. He will send the hawk at you. Quikly go back on the briodge and run back to the spot you were before...
It is very easy. First you have to crawl and listen to the Mayor and the rest about where to find the shield and sword. After this you HAVE TO FACE the hawk. You must make sure the guy (father of Beth) sees you and sends his Hawk at you. You can easily hide. Only after this you will be able to...