four o'clock
`` And I 'm dead beat , '' said Uncle Bob , sinking down . `` You 're right , Jack , we must have a rest . Let 's wait till it 's light . It will be broad day by four o'clock , and we can signal to him which way to come . '' I nestled down close to him , relieved in mind and body , and I was just thinking that though scraps of slaty stone and brashy earth were not good things for stuffing a feather-bed , they were , all the same , very comfortable for a weary person to lie upon , when I felt a hand laid upon my shoulder , and opening my eyes found the sun shining brightly and Uncle Dick looking down in my face . `` Have I been asleep ? '' I said confusedly .