ten minutes past ten
` It is ten o'clock , ' said the old man ; ` I believe somewhat past . ' ` A quarter , perhaps ? ' ` Yes , ' said the old man , ` a quarter , or -- ' ` Or ? ' ` Seven minutes , or ten minutes past ten . ' ` I do not understand you . ' ` Why , to tell you the truth , ' said the old man , with a smile , ` there is one thing to the knowledge of which I could never exactly attain . ' ` Do you mean to say , ' said I , ` that you do not know what 's o'clock ? '