four o'clock
`` But I 'm dead certain it 'll be all right . What is the matter ? '' she asked , looking up as the door of the life room opened and the men began to come out carrying their canvases and drawing-boards as though the pose were over . `` It ca n't be four o'clock , surely . Ju has n't been gone a half hour . '' Naskowski , on his way to the modeling room , paused to answer Patricia 's question . `` There iss a demonstration in the living anatomy , for all students -- a man who can dislocate his joints at will and do other methods of showing muscle action , '' he explained .