about five o'clock
`` Has any one been to his room ? '' asked Ned . `` Yes , but it is locked and the key is not here . I was up on that floor about five o'clock , when the hospital people took a man out of the room next to his , and his door was locked then . '' Ned stood for a moment in deep thought , hesitating , wondering if the clerk was a man to be trusted in a great emergency . `` You look to me like a dependable man , '' he finally said to the clerk , `` anyway , I 've got to take you into my confidence . Will you take duplicate keys to the lieutenant 's room and the room next to it and come with me ? ''