eleven o'clock
The twins did not sleep much that night . Roy and Rex slept far into the morning , which was Saturday . They were awakened finally by a persistent knocking on the door and Jess 's voice : `` Are you boys going to sleep all day ? Have you forgotten we were all going to Marley at eleven o'clock ? And here 's a note Syd left for you , Rex . He 's much better and gone to the office . Get up now or we sha n't save breakfast '' `` All right , '' responded Roy , and he shook his brother and told him about Syd 's note .