She stumbled to the nearest window. It was open barely a crack at the bottom; but the sash was easily raised, even by the child's failing strength. A rush of cool, salt air swept into Carolyn's face. It revived her, for the little girl herself had been almost overcome by the stifling vapour. Prince got his forepaws on the windowsill, sniffed the breeze, and uttered a short, enquiring bark. "Hush! You mustn't, Prince," commanded the child, remembering the necessity for keeping the dog quiet at night in the hotel room. Then she turned abruptly from the window. She must get help for mamma. Something bad had happened, and Carolyn's thoughts turned to the doctor, who she knew was staying in the Truefelt House. She knew where his office was--at the other end of the house, on this same floor, and around the front stairwell in a side corridor. He was a very nice man, Doctor Warren, so thought Carolyn. She had reached the door into the hall by this time and was fumbling with the key and bolt. It did not seem so hard to breathe now. Prince was coughing softly right behind her. When the door opened, quite suddenly, Carolyn almost screamed aloud. But the necessity for closing her mouth and eyes instantly stifled her involuntary cry. The hotel corridor was filled with yellow smoke! There had been a squall from the east before midnight, and somebody had shut the hall windows against the beating rain. The middle of the house thereby was made a closed compartment when the first floor doors were shut, and the smoke was so thick that the little girl was very much terrified. She dropped to the floor. Prince crouched with her and coughed. "Princey," she choked, admonishingly, "if you don't stop you'll wake up everybody in the house." The open window across mamma's room created a draught that sucked the smoke out of the corridor. And it was not so thick near the floor. On her hands and knees Carolyn May could breathe with much greater ease. She crept out of the room under the rolling cloud of smoke, and moved on all fours along the cocoa-runner through the middle of the hall. There were two lamps burning here; but they were turned low, anyway, and gave little light. The yellow murk caused by the smoke made every object appear queer. Although the draught through Mrs. Cameron's room began at once to clear the smoke out of the corridor, more was rolling up the open stairway. From below Carolyn heard a strange crackling sound. There was a growing light down there, too. But the child did not at all understand it. She was thinking mainly of Mamma Cameron and that she must get the doctor to her as soon as possible. The dog crept close after her as she scrambled over the cocoa-matting. He hung his muzzle near the floor. Instinct told Prince that the yellow cloud which rolled above them was not good to breathe.