five o’clock
At last she could keep silence no longer . `` Oh , dear ! '' she said , yawning audibly . `` It must be five o'clock at the very earliest . '' Agatha turned round upon the piano-stool , feeling that music and Lady Brandon were incompatible . Sir Charles , for his guest 's sake , tried hard to restrain his exasperation . `` Probably your watch will tell you , '' he said .