Jackson doesn't wait to be announced. He lets the door of Norrell's study herald his arrival, with a loud bang of the door hitting the wall. Thing is, Jackson's not even upset-- or in a hurry -- he's just inconsiderate and thoughtless, as evidenced by his after-the-fact apology.

"Apologies." He enters the room, and pulls the door shut. "I've been rushin' 'round all day. Murder down in Whitechapel. Some fella got dismembered and piled into a newspaper box. The Daily Mail. Poor bastard."

Jackson ceases his rambling, removing his hat and holding it in front of him. He walks up to where Norrell's composing his missives.

"... which is why I can't be of more service to Daybreak's cause of the day. I'm busy." He slips out the letter from his pocket, addressed from Norrell. "Though if we're bein' honest here, it's more like your cause, ain't it?"