About midnight
The postilions drove exceedingly fast all the way over the marshes . The stage stopped three times to change horses . Mr. George kept up a continual conversation with Rollo all the way , in order to prevent him from going to sleep ; for , as I have said before , it is considered dangerous to sleep while on the marshes . About midnight Rollo proposed that they should eat their supper . `` No , '' said Mr. George , `` we will keep our supper for the last thing . As long as we can keep awake without it we will . '' So they went on for two hours longer .