To this he would not agree.  "You require all the sleep that you can get," he said.  "No enemy, either, is able to break in on us unawares. I have made arrangements in case of an attack, as you would have seen, had you examined the entrance.  There is a thick door which can be slid across it; and in the door several loopholes, so that Sandy and I could hold it against any number of Indians who might manage to make their way up the hill."