twelve o'clock
`` Is there anything that might have any connection with this matter that you have n't yet told us ? '' continued his questioner . `` Only one thing , '' replied Fred , to whom at that moment came the recollection of what he had seen in the moonlight . `` I did see a fellow going away from the Hall the other night after twelve o'clock . '' `` Ah , '' came from both men , bending forward , and then they questioned him carefully about the size and general appearance of the midnight skulker . `` Why did n't you tell some of us about that at the time ? '' asked Doctor Rally severely .