just as she was losing her hold of the great beast 's horns , however , and feeling that she must fall to the ground , he turned his massive head round a little , and , speaking in a wonderfully soft and gentle voice , said : " eat out of my right ear , and drink out of my left ear , so wilt thou be refreshed for thy journey . " so the princess put a trembling hand into the bull 's right ear , and drew out some bread and meat , which , in spite of her terror , she was glad to swallow ; then she put her hand into his left ear , and found there a tiny flagon of wine , and when she had drunk that , her strength returned to her in a wonderful way . long they went , and sore they rode , till , just as it seemed to the princess that they must be getting near the world 's end , they came in sight of a magnificent castle . " that 's where we maun bide this night , " said the black bull of norroway , " for that is the house of one of my brothers . " the princess was greatly surprised at these words ; but by this time she was too tired to wonder very much at anything , so she did not answer , but sat still where she was , until the bull ran into the courtyard of the castle and knocked his great head against the door . the door was opened at once by a very splendid footman , who treated the black bull with great respect , and helped the princess to alight from his back . then he ushered her into a magnificent hall , where the lord of the castle , and his lady , and a great and noble company were assembled ; while the black bull trotted off quite contentedly to the grassy park which stretched all round the building , to spend the night there . the lord and his lady were very kind to the princess , and gave her her supper , and led her to a richly furnished bedroom , all hung round with golden mirrors , and left her to rest there ; and in the morning , just as the black bull came trotting up to the front door , they handed her a beautiful apple , telling her not to break it , but to put it in her pocket , and keep it till she was in the greatest strait that mortal could be in . then she was to break it , and it would bring her out of it . 
she was too tired to wonder very much at anything .
why didn't the youngest princess reply to the black bull when they arrived at his brother's castle ?
why didn't the youngest princess reply to the black bull when they arrived at his brother's castle ?