ten o'clock
He regretted his initial plan , which had at first seemed so practical to him . As he reached the fifth floor , he decided to give up the search , took his leave of a friendly , young worker who wanted to lead him on still further and went down the stairs . But then the thought of how much time he was wasting made him cross , he went back again and knocked at the first door on the fifth floor . The first thing he saw in the small room was a large clock on the wall which already showed ten o'clock . `` Is there a joiner called Lanz who lives here ? '' he asked . `` Pardon ? ''