about four
o'clock in the morning
`` I do n't even know what you mean , '' she announced demurely , and they all laughed at her . `` I wish you people would stop talking , '' Grace broke in plaintively . `` I 've simply got to get some sleep ! '' And they slept the hearty sleep of tired girlhood till about four o'clock in the morning . Then Amy , in the room next to Betty and Mollie , rubbed her eyes , coughed a little , then sat up with a cry of alarm . Smoke was curling thickly in around the crack in the door and the air was hot and suffocating . Somewhere the sound of crackling , snapping wood , the lurid flare of flames -- `` Fire !