Bentley: Sly! It appears the Black Knight has a patrol moving an object in a locked case through the town. From the level of security, I'd bet the farm it's Galleth's cane!
Sly: You have a farm?
Bentley: Just get over there! If what Galleth says is true, the Black Knight almost never leaves his castle. And when he does, it's only to briefly visit the Blacksmith Shop. This may be the one opportunity we have to steal the cane back!
Sly: Okay, time to join the parade.
― During the mission briefing
Bentley informs Sly that the Black Knight is carrying what he is suspecting to be Sir Galleth's cane in a case through town. With this being one of the only times the Black Knight would come out the castle, Bentley tasks Sly with stealing the cane. Before that, though, Sly takes some pictures of the Black Knight's suit and the lock of the cane's case for Bentley to analyze.
Sly then dispatches the two mech wolves that were guarding the rear of the cane's case, and Bentley remotely hacks the lock. Once it's open, Sly steals the cane and takes it back to its rightful owner.