at night all three of them slept together in one room . when they woke in the morning , the king came in to them , said good - morning , and asked how they were . but he was much surprised to see that sheep - peter was keeping them company . then the youth said : " i was in the war , and slew all of the enemy ! " " ah ! " said the king , " you did not do that , it was an angel from heaven ; for you were sitting in the swamp . " then sheep - peter drew out the king 's handkerchief , and then the king recognized him . then the herdsman said : " i also delivered the princesses ! " but the king would not believe that , and laughed at him . and then the youngest princess came along and told how it all had happened .
he drew out the king 's handkerchief .
how did sheep-peter prove that he was the one who saved the king ?
how did sheep-peter prove that he was the one who saved the king ?