eleven o’clock
Once past the petrified forest , I could see the Nautilus 's beacon twinkling like a star . The captain walked straight toward it , and we were back on board just as the first glimmers of dawn were whitening the surface of the ocean . The Underwater Coalfields THE NEXT DAY , February 20 , I overslept . I was so exhausted from the night before , I did n't get up until eleven o'clock . I dressed quickly . I hurried to find out the Nautilus 's heading . The instruments indicated that it was running southward at a speed of twenty miles per hour and a depth of 100 meters .