Curnow's Visit is a written note found in Dishonored.
Transcript
Wayland,
Captain Curnow and his retinue will be here this evening. See that they are allowed through the checkpoint without incident. I would like him in a fair mood when I have drinks with him in the meeting chamber.
Also, be prepared to defend the checkpoint from the inside should things go awry with negotiations. Not that I expect they should, but I want your Overseers prepared in case Curnow and his men live up to the City Watch's reputation.
Location
It can be found upon first entering Holger Square in the checkpoint to the left of the gate during the mission High Overseer Campbell.