nine o'clock
It could n't walk out of Hilary 's desk by itself ! She _ knows _ she left it there yesterday . If anybody 's hiding it for a joke , please give it back at once . If it 's not brought back by nine o'clock I shall tell Miss Todd . Yes , I 'm in earnest ! Dead earnest ! '' Seniors , intermediates , and juniors , very much astonished , retired to their form rooms and talked the matter over ; but nobody produced the missing manuscript .